    <SEC-DOCUMENT>0001104659-21-058245-index.html : 20210430
    <SEC-HEADER>0001104659-21-058245.hdr.sgml : 20210430
    <ACCEPTANCE-DATETIME>20210430075657
    ACCESSION NUMBER:		0001104659-21-058245
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		5
    CONFORMED PERIOD OF REPORT:	20210728
    FILED AS OF DATE:		20210430
    DATE AS OF CHANGE:		20210430

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CRA INTERNATIONAL, INC.
    		CENTRAL INDEX KEY:			0001053706
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-LEGAL SERVICES [8111]
    		IRS NUMBER:				042372210
    		STATE OF INCORPORATION:			MA
    		FISCAL YEAR END:			0102

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-24049
    		FILM NUMBER:		21873793

    	BUSINESS ADDRESS:
    		STREET 1:		200 CLARENDON STREET
    		STREET 2:		T-9
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02116
    		BUSINESS PHONE:		6174253000

    	MAIL ADDRESS:
    		STREET 1:		200 CLARENDON STREET
    		STREET 2:		T-9
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02116

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CHARLES RIVER ASSOCIATES INC
    		DATE OF NAME CHANGE:	19980126
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>tm212460-1_def14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: tm212460-1_def14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>lg_charlesriver-bw.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: lg_charlesriver-bw.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>sg_petermrosenblum-bw.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: sg_petermrosenblum-bw.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>tm212460d1-proxy_1cra4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: tm212460d1-proxy_1cra4c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>tm212460d1-proxy_2cra4c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: tm212460d1-proxy_2cra4c.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>