    <SEC-DOCUMENT>0000715579-24-000123-index.html : 20241112
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    <ACCEPTANCE-DATETIME>20241112081417
    ACCESSION NUMBER:		0000715579-24-000123
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		17
    CONFORMED PERIOD OF REPORT:	20241112
    ITEM INFORMATION:		Other Events
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20241112
    DATE AS OF CHANGE:		20241112

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ACNB CORP
    		CENTRAL INDEX KEY:			0000715579
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		ORGANIZATION NAME:           	02 Finance
    		IRS NUMBER:				232233457
    		STATE OF INCORPORATION:			PA
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-35015
    		FILM NUMBER:		241443626

    	BUSINESS ADDRESS:
    		STREET 1:		16 LINCOLN SQUARE
    		STREET 2:		P O BOX 3129
    		CITY:			GETTYSBURG
    		STATE:			PA
    		ZIP:			17325
    		BUSINESS PHONE:		7173343161

    	MAIL ADDRESS:
    		STREET 1:		P O BOX 3129
    		STREET 2:		16 LINCOLN SQUARE
    		CITY:			GETTYSBURG
    		STATE:			PA
    		ZIP:			17325
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    <DESCRIPTION>8-K
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    Document 1 - file: acnb-20241112.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
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    <FILENAME>pressrelease2024-acnband.htm
    <DESCRIPTION>EX-99.1
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    Document 2 - file: pressrelease2024-acnband.htm

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    <FILENAME>acnb-20241112.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
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    <FILENAME>pressrelease2024-acnband001.jpg
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    <TYPE>XML
    <SEQUENCE>15
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