    <SEC-DOCUMENT>0001437749-23-028511-index.html : 20231018
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    <ACCEPTANCE-DATETIME>20231018160449
    ACCESSION NUMBER:		0001437749-23-028511
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		31
    CONFORMED PERIOD OF REPORT:	20231018
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20231018
    DATE AS OF CHANGE:		20231018

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MARTEN TRANSPORT LTD
    		CENTRAL INDEX KEY:			0000799167
    		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCKING (NO LOCAL) [4213]
    		IRS NUMBER:				391140809
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-15010
    		FILM NUMBER:		231332255

    	BUSINESS ADDRESS:
    		STREET 1:		129 MARTEN ST
    		CITY:			MONDOVI
    		STATE:			WI
    		ZIP:			54755
    		BUSINESS PHONE:		7159264216

    	MAIL ADDRESS:
    		STREET 1:		3400 PLAZA VII
    		STREET 2:		45 SOUTH SEVENTH ST
    		CITY:			MINNEAPOLIS
    		STATE:			MN
    		ZIP:			55402
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    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>mrtn20231017_8k.htm
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    Document 1 - file: mrtn20231017_8k.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>ex_581843.htm
    <DESCRIPTION>EXHIBIT 99.1
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    Document 2 - file: ex_581843.htm

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    <SEQUENCE>3
    <FILENAME>ex_581844.htm
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    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>mrtn-20231018.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 4 - file: mrtn-20231018.xsd

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    <TEXT>
    Document 10 - file: pic03.jpg

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    <SEQUENCE>11
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    <TEXT>
    Document 11 - file: pic04.jpg

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    <TEXT>
    Document 12 - file: pic05.jpg

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    <SEQUENCE>13
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    Document 13 - file: pic06.jpg

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    Document 14 - file: pic07.jpg

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    Document 15 - file: pic08.jpg

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    Document 16 - file: pic09.jpg

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    Document 17 - file: pic10.jpg

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    Document 18 - file: pic11.jpg

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    <SEQUENCE>19
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    Document 19 - file: pic12.jpg

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    <SEQUENCE>20
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    Document 20 - file: pic13.jpg

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    <SEQUENCE>21
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    Document 21 - file: pic14.jpg

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    <SEQUENCE>22
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    Document 22 - file: pic15.jpg

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    <SEQUENCE>23
    <FILENAME>pic16.jpg
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    <TYPE>XML
    <SEQUENCE>24
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    <TEXT>
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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>26
    <FILENAME>Financial_Report.xlsx
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    <TEXT>
    Document 26 - file: Financial_Report.xlsx

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    <SEQUENCE>27
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    <SEQUENCE>29
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    Document 29 - RAW XML: FilingSummary.xml

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    <TYPE>JSON
    <SEQUENCE>31
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    Document 31 - file: MetaLinks.json

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