<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
<!--Generated by ThunderDome XBRL - 12:45AM UTC 2026-07-31--><xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:country="http://xbrl.sec.gov/country/2026" xmlns:currency="http://xbrl.sec.gov/currency/2026" xmlns:dei="http://xbrl.sec.gov/dei/2026" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:ecd="http://xbrl.sec.gov/ecd/2026" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:exch="http://xbrl.sec.gov/exch/2026" xmlns:hun="http://www.huntsman.com/20260630" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:naics="http://xbrl.sec.gov/naics/2026" xmlns:sic="http://xbrl.sec.gov/sic/2026" xmlns:srt="http://fasb.org/srt/2026" xmlns:srt-types="http://fasb.org/srt-types/2026" xmlns:stpr="http://xbrl.sec.gov/stpr/2026" xmlns:us-gaap="http://fasb.org/us-gaap/2026" xmlns:us-types="http://fasb.org/us-types/2026" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.huntsman.com/20260630">
  <xsd:import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/ecd/2026" schemaLocation="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd"/>
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/exch/2026" schemaLocation="https://xbrl.sec.gov/exch/2026/exch-2026.xsd"/>
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/currency/2026" schemaLocation="https://xbrl.sec.gov/currency/2026/currency-2026.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/country/2026" schemaLocation="https://xbrl.sec.gov/country/2026/country-2026.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/naics/2026" schemaLocation="https://xbrl.sec.gov/naics/2026/naics-2026.xsd"/>
  <xsd:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xsd:import namespace="http://xbrl.org/2020/extensible-enumerations-2.0" schemaLocation="https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2026" schemaLocation="https://xbrl.sec.gov/stpr/2026/stpr-2026.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/sic/2026" schemaLocation="https://xbrl.sec.gov/sic/2026/sic-2026.xsd"/>
  <xsd:import namespace="http://fasb.org/us-types/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-types-2026.xsd"/>
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd"/>
  <xsd:import namespace="http://fasb.org/srt-types/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-types-2026.xsd"/>
  <xsd:import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd"/>
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hun-20260630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hun-20260630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hun-20260630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hun-20260630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="statement-document-and-entity-information" roleURI="http://www.huntsman.com/20260630/role/statement-document-and-entity-information">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">000 - Document - Document And Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-balance-sheets-current-period-unaudited" roleURI="http://www.huntsman.com/20260630/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">001 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals" roleURI="http://www.huntsman.com/20260630/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">002 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-statements-of-operations-unaudited" roleURI="http://www.huntsman.com/20260630/role/statement-condensed-consolidated-statements-of-operations-unaudited">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">003 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-statements-of-comprehensive-loss-income-unaudited" roleURI="http://www.huntsman.com/20260630/role/statement-condensed-consolidated-statements-of-comprehensive-loss-income-unaudited">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">004 - Statement - Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-statements-of-equity-unaudited" roleURI="http://www.huntsman.com/20260630/role/statement-condensed-consolidated-statements-of-equity-unaudited">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">005 - Statement - Condensed Consolidated Statements of Equity (Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-statements-of-equity-unaudited-parentheticals" roleURI="http://www.huntsman.com/20260630/role/statement-condensed-consolidated-statements-of-equity-unaudited-parentheticals">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">006 - Statement - Condensed Consolidated Statements of Equity (Unaudited) (Parentheticals)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-statements-of-cash-flows-unaudited" roleURI="http://www.huntsman.com/20260630/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">007 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-statements-of-cash-flows-unaudited-parentheticals" roleURI="http://www.huntsman.com/20260630/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited-parentheticals">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">008 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) (Parentheticals)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-1-general" roleURI="http://www.huntsman.com/20260630/role/statement-note-1-general">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">009 - Disclosure - Note 1 - General</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-2-accounting-standards" roleURI="http://www.huntsman.com/20260630/role/statement-note-2-accounting-standards">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">010 - Disclosure - Note 2 - Accounting Standards</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-3-business-combinations-and-acquisitions" roleURI="http://www.huntsman.com/20260630/role/statement-note-3-business-combinations-and-acquisitions">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">011 - Disclosure - Note 3 - Business Combinations and Acquisitions</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-inventories" roleURI="http://www.huntsman.com/20260630/role/statement-note-4-inventories">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">012 - Disclosure - Note 4 - Inventories</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-variable-interest-entities" roleURI="http://www.huntsman.com/20260630/role/statement-note-5-variable-interest-entities">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">013 - Disclosure - Note 5 - Variable Interest Entities</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-supplier-finance-program" roleURI="http://www.huntsman.com/20260630/role/statement-note-6-supplier-finance-program">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">014 - Disclosure - Note 6 - Supplier Finance Program</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-restructuring-impairment-and-plant-closing-costs" roleURI="http://www.huntsman.com/20260630/role/statement-note-7-restructuring-impairment-and-plant-closing-costs">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">015 - Disclosure - Note 7 - Restructuring, Impairment and Plant Closing Costs</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-debt" roleURI="http://www.huntsman.com/20260630/role/statement-note-8-debt">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">016 - Disclosure - Note 8 - Debt</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-derivative-instruments-and-hedging-activities" roleURI="http://www.huntsman.com/20260630/role/statement-note-9-derivative-instruments-and-hedging-activities">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">017 - Disclosure - Note 9 - Derivative Instruments and Hedging Activities</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-fair-value" roleURI="http://www.huntsman.com/20260630/role/statement-note-10-fair-value">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">018 - Disclosure - Note 10 - Fair Value</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-revenue-recognition" roleURI="http://www.huntsman.com/20260630/role/statement-note-11-revenue-recognition">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">019 - Disclosure - Note 11 - Revenue Recognition</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-employee-benefit-plans" roleURI="http://www.huntsman.com/20260630/role/statement-note-12-employee-benefit-plans">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">020 - Disclosure - Note 12 - Employee Benefit Plans</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-huntsman-corporation-stockholders-equity" roleURI="http://www.huntsman.com/20260630/role/statement-note-13-huntsman-corporation-stockholders-equity">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">021 - Disclosure - Note 13 - Huntsman Corporation Stockholders' Equity</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-accumulated-other-comprehensive-loss" roleURI="http://www.huntsman.com/20260630/role/statement-note-14-accumulated-other-comprehensive-loss">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">022 - Disclosure - Note 14 - Accumulated Other Comprehensive Loss</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-15-commitments-and-contingencies" roleURI="http://www.huntsman.com/20260630/role/statement-note-15-commitments-and-contingencies">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">023 - Disclosure - Note 15 - Commitments and Contingencies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-environmental-health-and-safety-matters" roleURI="http://www.huntsman.com/20260630/role/statement-note-16-environmental-health-and-safety-matters">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">024 - Disclosure - Note 16 - Environmental, Health and Safety Matters</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-17-stockbased-compensation-plan" roleURI="http://www.huntsman.com/20260630/role/statement-note-17-stockbased-compensation-plan">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">025 - Disclosure - Note 17 - Stock-based Compensation Plan</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-18-income-taxes" roleURI="http://www.huntsman.com/20260630/role/statement-note-18-income-taxes">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">026 - Disclosure - Note 18 - Income Taxes</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-19-earnings-per-share" roleURI="http://www.huntsman.com/20260630/role/statement-note-19-earnings-per-share">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">027 - Disclosure - Note 19 - Earnings Per Share</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-20-operating-segment-information" roleURI="http://www.huntsman.com/20260630/role/statement-note-20-operating-segment-information">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">028 - Disclosure - Note 20 - Operating Segment Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-3-business-combinations-and-acquisitions-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-3-business-combinations-and-acquisitions-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995475 - Disclosure - Note 3 - Business Combinations and Acquisitions (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-inventories-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-4-inventories-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995476 - Disclosure - Note 4 - Inventories (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-variable-interest-entities-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-5-variable-interest-entities-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995477 - Disclosure - Note 5 - Variable Interest Entities (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-restructuring-impairment-and-plant-closing-costs-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-7-restructuring-impairment-and-plant-closing-costs-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995478 - Disclosure - Note 7 - Restructuring, Impairment and Plant Closing Costs (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-debt-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-8-debt-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995479 - Disclosure - Note 8 - Debt (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-fair-value-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-10-fair-value-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995480 - Disclosure - Note 10 - Fair Value (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-revenue-recognition-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-11-revenue-recognition-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995481 - Disclosure - Note 11 - Revenue Recognition (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-employee-benefit-plans-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-12-employee-benefit-plans-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995482 - Disclosure - Note 12 - Employee Benefit Plans (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-accumulated-other-comprehensive-loss-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-14-accumulated-other-comprehensive-loss-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995483 - Disclosure - Note 14 - Accumulated Other Comprehensive Loss (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-17-stockbased-compensation-plan-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-17-stockbased-compensation-plan-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995484 - Disclosure - Note 17 - Stock-based Compensation Plan (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-19-earnings-per-share-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-19-earnings-per-share-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995485 - Disclosure - Note 19 - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-20-operating-segment-information-tables" roleURI="http://www.huntsman.com/20260630/role/statement-note-20-operating-segment-information-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995486 - Disclosure - Note 20 - Operating Segment Information (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-1-general-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-1-general-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995487 - Disclosure - Note 1 - General (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-3-business-combinations-and-acquisitions-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-3-business-combinations-and-acquisitions-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995488 - Disclosure - Note 3 - Business Combinations and Acquisitions (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-3-business-combinations-and-acquisitions-assets-acquired-and-liabilities-assumed-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-3-business-combinations-and-acquisitions-assets-acquired-and-liabilities-assumed-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995489 - Disclosure - Note 3 - Business Combinations and Acquisitions - Assets Acquired and Liabilities Assumed (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-inventories-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-4-inventories-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995490 - Disclosure - Note 4 - Inventories (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-inventories-inventories-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-4-inventories-inventories-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995491 - Disclosure - Note 4 - Inventories - Inventories (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-variable-interest-entities-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-5-variable-interest-entities-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995492 - Disclosure - Note 5 - Variable Interest Entities (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-variable-interest-entities-schedule-of-financial-information-of-variable-interest-entities-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-5-variable-interest-entities-schedule-of-financial-information-of-variable-interest-entities-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995493 - Disclosure - Note 5 - Variable Interest Entities - Schedule of Financial Information of Variable Interest Entities (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-supplier-finance-program-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-6-supplier-finance-program-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995494 - Disclosure - Note 6 - Supplier Finance Program (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-restructuring-impairment-and-plant-closing-costs-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-7-restructuring-impairment-and-plant-closing-costs-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995495 - Disclosure - Note 7 - Restructuring, Impairment and Plant Closing Costs (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-restructuring-impairment-and-plant-closing-costs-accrued-restructuring-costs-by-type-of-cost-and-initiative-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-7-restructuring-impairment-and-plant-closing-costs-accrued-restructuring-costs-by-type-of-cost-and-initiative-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995496 - Disclosure - Note 7 - Restructuring, Impairment and Plant Closing Costs - Accrued Restructuring Costs By Type of Cost and Initiative (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-restructuring-impairment-and-plant-closing-costs-reserves-for-restructuring-impairment-and-plant-closing-costs-by-segment-and-initiative-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-7-restructuring-impairment-and-plant-closing-costs-reserves-for-restructuring-impairment-and-plant-closing-costs-by-segment-and-initiative-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995497 - Disclosure - Note 7 - Restructuring, Impairment and Plant Closing Costs - Reserves for Restructuring, Impairment and Plant Closing Costs By Segment and Initiative (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-restructuring-impairment-and-plant-closing-costs-cash-and-noncash-restructuring-charges-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-7-restructuring-impairment-and-plant-closing-costs-cash-and-noncash-restructuring-charges-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995498 - Disclosure - Note 7 - Restructuring, Impairment and Plant Closing Costs - Cash and Noncash Restructuring Charges (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-debt-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-8-debt-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995499 - Disclosure - Note 8 - Debt (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-debt-outstanding-debt-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-8-debt-outstanding-debt-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995500 - Disclosure - Note 8 - Debt - Outstanding Debt (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-debt-revolving-credit-facility-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-8-debt-revolving-credit-facility-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995501 - Disclosure - Note 8 - Debt - Revolving Credit Facility (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-debt-notes-outstanding-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-8-debt-notes-outstanding-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995502 - Disclosure - Note 8 - Debt - Notes Outstanding (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-debt-notes-outstanding-details-parentheticals" roleURI="http://www.huntsman.com/20260630/role/statement-note-8-debt-notes-outstanding-details-parentheticals">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995503 - Disclosure - Note 8 - Debt - Notes Outstanding (Details) (Parentheticals)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-debt-accounts-receivable-programs-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-8-debt-accounts-receivable-programs-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995504 - Disclosure - Note 8 - Debt - Accounts Receivable Programs (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-derivative-instruments-and-hedging-activities-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-9-derivative-instruments-and-hedging-activities-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995505 - Disclosure - Note 9 - Derivative Instruments and Hedging Activities (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-fair-value-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-10-fair-value-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995506 - Disclosure - Note 10 - Fair Value (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-fair-value-fair-value-of-financial-instruments-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-10-fair-value-fair-value-of-financial-instruments-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995507 - Disclosure - Note 10 - Fair Value - Fair Value of Financial Instruments (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-revenue-recognition-disaggregation-of-revenue-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-11-revenue-recognition-disaggregation-of-revenue-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995508 - Disclosure - Note 11 - Revenue Recognition - Disaggregation of Revenue (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-employee-benefit-plans-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-12-employee-benefit-plans-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995509 - Disclosure - Note 12 - Employee Benefit Plans (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-employee-benefit-plans-components-of-net-benefit-costs-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-12-employee-benefit-plans-components-of-net-benefit-costs-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995510 - Disclosure - Note 12 - Employee Benefit Plans - Components of Net Benefit Costs (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-huntsman-corporation-stockholders-equity-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-13-huntsman-corporation-stockholders-equity-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995511 - Disclosure - Note 13 - Huntsman Corporation Stockholders' Equity (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-accumulated-other-comprehensive-loss-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-14-accumulated-other-comprehensive-loss-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995512 - Disclosure - Note 14 - Accumulated Other Comprehensive Loss (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-accumulated-other-comprehensive-loss-components-and-changes-in-accumulated-other-comprehensive-loss-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-14-accumulated-other-comprehensive-loss-components-and-changes-in-accumulated-other-comprehensive-loss-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995513 - Disclosure - Note 14 - Accumulated Other Comprehensive Loss - Components and Changes in Accumulated Other Comprehensive Loss (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-accumulated-other-comprehensive-loss-reclassification-details-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-14-accumulated-other-comprehensive-loss-reclassification-details-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995514 - Disclosure - Note 14 - Accumulated Other Comprehensive Loss - Reclassification Details (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-15-commitments-and-contingencies-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-15-commitments-and-contingencies-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995515 - Disclosure - Note 15 - Commitments and Contingencies (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-environmental-health-and-safety-matters-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-16-environmental-health-and-safety-matters-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995516 - Disclosure - Note 16 - Environmental, Health and Safety Matters (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-17-stockbased-compensation-plan-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-17-stockbased-compensation-plan-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995517 - Disclosure - Note 17 - Stock-based Compensation Plan (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-17-stockbased-compensation-plan-compensation-cost-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-17-stockbased-compensation-plan-compensation-cost-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995518 - Disclosure - Note 17 - Stock-based Compensation Plan - Compensation Cost (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-17-stockbased-compensation-plan-summary-of-stock-option-activity-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-17-stockbased-compensation-plan-summary-of-stock-option-activity-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995519 - Disclosure - Note 17 - Stock-based Compensation Plan - Summary of Stock Option Activity (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-17-stockbased-compensation-plan-summary-of-the-status-of-nonvested-shares-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-17-stockbased-compensation-plan-summary-of-the-status-of-nonvested-shares-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995520 - Disclosure - Note 17 - Stock-based Compensation Plan - Summary of the Status of Nonvested Shares (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-18-income-taxes-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-18-income-taxes-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995521 - Disclosure - Note 18 - Income Taxes (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-19-earnings-per-share-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-19-earnings-per-share-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995522 - Disclosure - Note 19 - Earnings Per Share (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-19-earnings-per-share-net-income-per-share-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-19-earnings-per-share-net-income-per-share-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995523 - Disclosure - Note 19 - Earnings Per Share - Net Income Per Share (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-20-operating-segment-information-details-textual" roleURI="http://www.huntsman.com/20260630/role/statement-note-20-operating-segment-information-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995524 - Disclosure - Note 20 - Operating Segment Information (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-20-operating-segment-information-financial-information-by-segment-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-20-operating-segment-information-financial-information-by-segment-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995525 - Disclosure - Note 20 - Operating Segment Information - Financial Information By Segment (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-20-operating-segment-information-segment-reconciliation-details" roleURI="http://www.huntsman.com/20260630/role/statement-note-20-operating-segment-information-segment-reconciliation-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">995526 - Disclosure - Note 20 - Operating Segment Information - Segment Reconciliation (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element abstract="true" id="hun_AccountsReceivableProgramsMember" name="AccountsReceivableProgramsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_AccumulatedDefinedBenefitPlansAdjustmentActuarialGainLossIncludingPortionAttributableToNoncontrollingInterestMember" name="AccumulatedDefinedBenefitPlansAdjustmentActuarialGainLossIncludingPortionAttributableToNoncontrollingInterestMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_AccumulatedDefinedBenefitPlansAdjustmentSettlementGainLossIncludingPortionAttributableToNoncontrollingInterest1Member" name="AccumulatedDefinedBenefitPlansAdjustmentSettlementGainLossIncludingPortionAttributableToNoncontrollingInterest1Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_AccumulatedOtherComprehensiveIncomeLossUnconsolidatedAffiliatesIncludingPortionAttributableToNoncontrollingInterestMember" name="AccumulatedOtherComprehensiveIncomeLossUnconsolidatedAffiliatesIncludingPortionAttributableToNoncontrollingInterestMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_AccumulatedOtherComprehensiveIncomeOtherNetIncludingPortionAttributableToNoncontrollingInterestMember" name="AccumulatedOtherComprehensiveIncomeOtherNetIncludingPortionAttributableToNoncontrollingInterestMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_AdjustmentsToRetainedEarningsStockOptionsExercised" name="AdjustmentsToRetainedEarningsStockOptionsExercised" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_AdvancedMaterialsMember" name="AdvancedMaterialsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_AociTaxAttributableToParentForeignCurrencyTranslationAdjustments" name="AociTaxAttributableToParentForeignCurrencyTranslationAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="hun_AociTaxAttributableToParentPensionAndOtherPostretirementBenefitAdjustments" name="AociTaxAttributableToParentPensionAndOtherPostretirementBenefitAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="hun_ArabianAminesCompanyMember" name="ArabianAminesCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_AssetAcquisitionCosts" name="AssetAcquisitionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_AssetbackedCommercialPaperRateMember" name="AssetbackedCommercialPaperRateMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_BusinessCombinationIntegrationrelatedCostExpenseNet" name="BusinessCombinationIntegrationrelatedCostExpenseNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_BusinessCombinationShareTransferRatio" name="BusinessCombinationShareTransferRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_CommonStockOutstandingMember" name="CommonStockOutstandingMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_ContributionsFromParent" name="ContributionsFromParent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="hun_CorporateAndOtherCostsNet" name="CorporateAndOtherCostsNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_CorporateAndReconcilingItemsMember" name="CorporateAndReconcilingItemsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_DerivativeMaximumMaturityPeriod" name="DerivativeMaximumMaturityPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_DiversifiedMember" name="DiversifiedMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_DividendsPaidToParent" name="DividendsPaidToParent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_DividendsPaidToParentCompany" name="DividendsPaidToParentCompany" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_EUARProgramMember" name="EUARProgramMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_EmployeeSeveranceAndAcceleratedDepreciationMember" name="EmployeeSeveranceAndAcceleratedDepreciationMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_EquityAwardsMember" name="EquityAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_EquityImpactOfRecognitionOfStockbasedCompensationIncludingUnearnedStockbasedCompensation" name="EquityImpactOfRecognitionOfStockbasedCompensationIncludingUnearnedStockbasedCompensation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_EuriborRateMember" name="EuriborRateMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_EuropeanMaleicAnhydrideManufacturingFacilityClosureInMoersGermanyMember" name="EuropeanMaleicAnhydrideManufacturingFacilityClosureInMoersGermanyMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_FixedCostsExcludingCostOfDepreciationAndAmortization" name="FixedCostsExcludingCostOfDepreciationAndAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_GainLossOnAcquisitionOfAssets" name="GainLossOnAcquisitionOfAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="hun_GainLossOnAssetAcquisitionNet" name="GainLossOnAssetAcquisitionNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_GometMember" name="GometMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_HuntsmanInternationalLLCMember" name="HuntsmanInternationalLLCMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_HuntsmanMember" name="HuntsmanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_IncomeLossFromOperationsBeforeInterestTaxDepreciationAndAmortizationNet" name="IncomeLossFromOperationsBeforeInterestTaxDepreciationAndAmortizationNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_LiabilityAwardsMember" name="LiabilityAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity" name="LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="hun_LitigationSettlementCashTaxAmountToBePaid" name="LitigationSettlementCashTaxAmountToBePaid" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="hun_LitigationSettlementsAndRelatedIncome" name="LitigationSettlementsAndRelatedIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_MaximumFundingAvailability" name="MaximumFundingAvailability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="hun_MaximumPeriodForPaymentOfRemediationLiabilities" name="MaximumPeriodForPaymentOfRemediationLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_MergerWithOlinCorporationMember" name="MergerWithOlinCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_MoersGermanyFacilityClosureMember" name="MoersGermanyFacilityClosureMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_NetIncomeLossAttributableToParentContinuingAndDiscontinuedOperations" name="NetIncomeLossAttributableToParentContinuingAndDiscontinuedOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_NetInvestmentHedgeMember" name="NetInvestmentHedgeMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_NoncashLeaseExpense" name="NoncashLeaseExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_NoncashPrepaidAssetWriteoff" name="NoncashPrepaidAssetWriteoff" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_NonvestedSharesMember" name="NonvestedSharesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_NumberOfInstrumentsCategorizedAsLevelThree" name="NumberOfInstrumentsCategorizedAsLevelThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_OlinCorporationMember" name="OlinCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_OtherDebtInstrumentsMember" name="OtherDebtInstrumentsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_OtherNoncurrentAssetsTotal" name="OtherNoncurrentAssetsTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="hun_OtherOperatingAndNonoperatingIncomeAndExpenseAndForeignCurrencyExchangeEffects" name="OtherOperatingAndNonoperatingIncomeAndExpenseAndForeignCurrencyExchangeEffects" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="hun_OwnershipPercentage" name="OwnershipPercentage" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="hun_PaymentsForRepurchaseAndCancellationOfStockAwards" name="PaymentsForRepurchaseAndCancellationOfStockAwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_PerformanceProductsMember" name="PerformanceProductsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_PerformanceShareUnitType1Member" name="PerformanceShareUnitType1Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_PolyurethanesMember" name="PolyurethanesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_PraxairlindeMember" name="PraxairlindeMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_ProceedsFromReturnOfInvestment" name="ProceedsFromReturnOfInvestment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_ProceedsFromReturnOnInvestmentAndReturnOfInvestment" name="ProceedsFromReturnOnInvestmentAndReturnOfInvestment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_ProceedsFromSaleOfBusinesses" name="ProceedsFromSaleOfBusinesses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_RelatedPartyCustomersMember" name="RelatedPartyCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_RestOfWorldMember" name="RestOfWorldMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_RestructuringCashCharges" name="RestructuringCashCharges" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_RestructuringChargesCredits" name="RestructuringChargesCredits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_RestructuringImpairmentAndPlantClosingCosts" name="RestructuringImpairmentAndPlantClosingCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_RestructuringProgramToOptimizeTheSegmentsManufacturingProcessesAndCostStructureMember" name="RestructuringProgramToOptimizeTheSegmentsManufacturingProcessesAndCostStructureMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_RestructuringProgramToRealignCostStructureMember" name="RestructuringProgramToRealignCostStructureMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_RestructuringProgramsToReduceOrganizationalStructureCostsMember" name="RestructuringProgramsToReduceOrganizationalStructureCostsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_RestructuringReserveAsset" name="RestructuringReserveAsset" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="hun_RestructuringReserveOtherNonCashCharges" name="RestructuringReserveOtherNonCashCharges" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_RestructuringSettlementAndImpairmentProvisionsCredits" name="RestructuringSettlementAndImpairmentProvisionsCredits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hun_RestructuringSettlementImpairmentAndTransitionCostsCredits" name="RestructuringSettlementImpairmentAndTransitionCostsCredits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_RubiconLlcMember" name="RubiconLlcMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_ScheduleOfAccountsReceivableProgramsTableTextBlock" name="ScheduleOfAccountsReceivableProgramsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_ScheduleOfCashAndNoncashRestructuringChargesByTypeOfInitiativeTableTextBlock" name="ScheduleOfCashAndNoncashRestructuringChargesByTypeOfInitiativeTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_ScheduleOfNotesOutstandingTableTextBlock" name="ScheduleOfNotesOutstandingTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_ScheduleOfRestructuringReserveByTypeOfCostAndSegmentTableTextBlock" name="ScheduleOfRestructuringReserveByTypeOfCostAndSegmentTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_SecuritiesDilutiveDueToLossMember" name="SecuritiesDilutiveDueToLossMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_SeniorNoteMaturingInOctober2034Member" name="SeniorNoteMaturingInOctober2034Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_SeniorNotesMaturingJune2031Member" name="SeniorNotesMaturingJune2031Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_SeniorNotesMaturingMay2029Member" name="SeniorNotesMaturingMay2029Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_ShanghaiLianhengIsocyanateCompanyLtdSlicMember" name="ShanghaiLianhengIsocyanateCompanyLtdSlicMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNotIssued" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNotIssued" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_ShareRepurchaseProgram2021Member" name="ShareRepurchaseProgram2021Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingAndExercisableIntrinsicValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingAndExercisableIntrinsicValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="hun_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingAndExercisableNumber" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingAndExercisableNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
  <xsd:element id="hun_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingAndExercisableWeightedAverageExercisePrice" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingAndExercisableWeightedAverageExercisePrice" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="instant"/>
  <xsd:element id="hun_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingAndExercisableWeightedAverageRemainingContractualTerm" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingAndExercisableWeightedAverageRemainingContractualTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_SiteClosuresWorkforceReductionsAndAcceleratedDepreciationMember" name="SiteClosuresWorkforceReductionsAndAcceleratedDepreciationMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_SiteContingencyNumberOfFormerFacilityOrThirdPartySitesWithClaimsAgainstEntityForCleanupLiabilities" name="SiteContingencyNumberOfFormerFacilityOrThirdPartySitesWithClaimsAgainstEntityForCleanupLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="hun_SpecialtyMember" name="SpecialtyMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_TermSecuredOvernightFinancingRateTermSOFRMember" name="TermSecuredOvernightFinancingRateTermSOFRMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_TermSofrEuriborOrSoniaMember" name="TermSofrEuriborOrSoniaMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_The2025StockIncentivePlanMember" name="The2025StockIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_TheRevolvingCreditFacilityMember" name="TheRevolvingCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_TheSeniorNotesMember" name="TheSeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_ThirdPartyCustomersMember" name="ThirdPartyCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_USARProgramMember" name="USARProgramMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_USAndCanadaMember" name="USAndCanadaMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hun_VariableDirectCosts" name="VariableDirectCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_VariableInterestEntitiesDebtMember" name="VariableInterestEntitiesDebtMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_WorkforceReductionAndContractTerminationMember" name="WorkforceReductionAndContractTerminationMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-10-fair-value-fair-value-of-financial-instruments-details" name="statement-statement-note-10-fair-value-fair-value-of-financial-instruments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-10-fair-value-tables" name="statement-statement-note-10-fair-value-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-11-revenue-recognition-disaggregation-of-revenue-details" name="statement-statement-note-11-revenue-recognition-disaggregation-of-revenue-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-11-revenue-recognition-tables" name="statement-statement-note-11-revenue-recognition-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-12-employee-benefit-plans-components-of-net-benefit-costs-details" name="statement-statement-note-12-employee-benefit-plans-components-of-net-benefit-costs-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-12-employee-benefit-plans-tables" name="statement-statement-note-12-employee-benefit-plans-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-14-accumulated-other-comprehensive-loss-components-and-changes-in-accumulated-other-comprehensive-loss-details" name="statement-statement-note-14-accumulated-other-comprehensive-loss-components-and-changes-in-accumulated-other-comprehensive-loss-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-14-accumulated-other-comprehensive-loss-reclassification-details-details" name="statement-statement-note-14-accumulated-other-comprehensive-loss-reclassification-details-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-14-accumulated-other-comprehensive-loss-tables" name="statement-statement-note-14-accumulated-other-comprehensive-loss-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-17-stockbased-compensation-plan-compensation-cost-details" name="statement-statement-note-17-stockbased-compensation-plan-compensation-cost-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-17-stockbased-compensation-plan-summary-of-stock-option-activity-details" name="statement-statement-note-17-stockbased-compensation-plan-summary-of-stock-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-17-stockbased-compensation-plan-summary-of-the-status-of-nonvested-shares-details" name="statement-statement-note-17-stockbased-compensation-plan-summary-of-the-status-of-nonvested-shares-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-17-stockbased-compensation-plan-tables" name="statement-statement-note-17-stockbased-compensation-plan-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-19-earnings-per-share-net-income-per-share-details" name="statement-statement-note-19-earnings-per-share-net-income-per-share-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-19-earnings-per-share-tables" name="statement-statement-note-19-earnings-per-share-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-20-operating-segment-information-financial-information-by-segment-details" name="statement-statement-note-20-operating-segment-information-financial-information-by-segment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-20-operating-segment-information-segment-reconciliation-details" name="statement-statement-note-20-operating-segment-information-segment-reconciliation-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-20-operating-segment-information-tables" name="statement-statement-note-20-operating-segment-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-3-business-combinations-and-acquisitions-assets-acquired-and-liabilities-assumed-details" name="statement-statement-note-3-business-combinations-and-acquisitions-assets-acquired-and-liabilities-assumed-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-3-business-combinations-and-acquisitions-tables" name="statement-statement-note-3-business-combinations-and-acquisitions-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-4-inventories-inventories-details" name="statement-statement-note-4-inventories-inventories-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-4-inventories-tables" name="statement-statement-note-4-inventories-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-5-variable-interest-entities-schedule-of-financial-information-of-variable-interest-entities-details" name="statement-statement-note-5-variable-interest-entities-schedule-of-financial-information-of-variable-interest-entities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-5-variable-interest-entities-tables" name="statement-statement-note-5-variable-interest-entities-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-7-restructuring-impairment-and-plant-closing-costs-accrued-restructuring-costs-by-type-of-cost-and-initiative-details" name="statement-statement-note-7-restructuring-impairment-and-plant-closing-costs-accrued-restructuring-costs-by-type-of-cost-and-initiative-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-7-restructuring-impairment-and-plant-closing-costs-cash-and-noncash-restructuring-charges-details" name="statement-statement-note-7-restructuring-impairment-and-plant-closing-costs-cash-and-noncash-restructuring-charges-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-7-restructuring-impairment-and-plant-closing-costs-reserves-for-restructuring-impairment-and-plant-closing-costs-by-segment-and-initiative-details" name="statement-statement-note-7-restructuring-impairment-and-plant-closing-costs-reserves-for-restructuring-impairment-and-plant-closing-costs-by-segment-and-initiative-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-7-restructuring-impairment-and-plant-closing-costs-tables" name="statement-statement-note-7-restructuring-impairment-and-plant-closing-costs-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-8-debt-accounts-receivable-programs-details" name="statement-statement-note-8-debt-accounts-receivable-programs-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-8-debt-notes-outstanding-details" name="statement-statement-note-8-debt-notes-outstanding-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-8-debt-notes-outstanding-details-parentheticals" name="statement-statement-note-8-debt-notes-outstanding-details-parentheticals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-8-debt-outstanding-debt-details" name="statement-statement-note-8-debt-outstanding-debt-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-8-debt-revolving-credit-facility-details" name="statement-statement-note-8-debt-revolving-credit-facility-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hun_statement-statement-note-8-debt-tables" name="statement-statement-note-8-debt-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
