    <SEC-DOCUMENT>0000874238-23-000086-index.html : 20230512
    <SEC-HEADER>0000874238-23-000086.hdr.sgml : 20230512
    <ACCEPTANCE-DATETIME>20230512074502
    ACCESSION NUMBER:		0000874238-23-000086
    CONFORMED SUBMISSION TYPE:	8-A12B/A
    PUBLIC DOCUMENT COUNT:		9
    FILED AS OF DATE:		20230512
    DATE AS OF CHANGE:		20230512

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			STERLING INFRASTRUCTURE, INC.
    		CENTRAL INDEX KEY:			0000874238
    		STANDARD INDUSTRIAL CLASSIFICATION:	HEAVY CONSTRUCTION OTHER THAN BUILDING CONST - CONTRACTORS [1600]
    		IRS NUMBER:				251655321
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-A12B/A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-31993
    		FILM NUMBER:		23913194

    	BUSINESS ADDRESS:
    		STREET 1:		1800 HUGHES LANDING BLVD.
    		STREET 2:		SUITE 250
    		CITY:			THE WOODLANDS
    		STATE:			TX
    		ZIP:			77380
    		BUSINESS PHONE:		281-214-0777

    	MAIL ADDRESS:
    		STREET 1:		1800 HUGHES LANDING BLVD.
    		STREET 2:		SUITE 250
    		CITY:			THE WOODLANDS
    		STATE:			TX
    		ZIP:			77380

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	STERLING CONSTRUCTION CO INC
    		DATE OF NAME CHANGE:	20020329

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	OAKHURST CO INC
    		DATE OF NAME CHANGE:	19950831

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	OAKHURST CAPITAL INC
    		DATE OF NAME CHANGE:	19931130
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-A12B/A
    <SEQUENCE>1
    <FILENAME>a20230512form8-aa.htm
    <DESCRIPTION>8-A12B/A
    <TEXT>
    Document 1 - file: a20230512form8-aa.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.1
    <SEQUENCE>2
    <FILENAME>ex31-strlxcompositecerti.htm
    <DESCRIPTION>EX-3.1
    <TEXT>
    Document 2 - file: ex31-strlxcompositecerti.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-4.1
    <SEQUENCE>3
    <FILENAME>ex41-formofcommonstockce.htm
    <DESCRIPTION>EX-4.1
    <TEXT>
    Document 3 - file: ex41-formofcommonstockce.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>ex31-strlxcompositecerti001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: ex31-strlxcompositecerti001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>ex31-strlxcompositecerti002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: ex31-strlxcompositecerti002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>ex31-strlxcompositecerti003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: ex31-strlxcompositecerti003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>ex31-strlxcompositecerti004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: ex31-strlxcompositecerti004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ex41-formofcommonstockce001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: ex41-formofcommonstockce001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>ex41-formofcommonstockce002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: ex41-formofcommonstockce002.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>