    <SEC-DOCUMENT>0001488139-22-000063-index.html : 20220408
    <SEC-HEADER>0001488139-22-000063.hdr.sgml : 20220408
    <ACCEPTANCE-DATETIME>20220408074312
    ACCESSION NUMBER:		0001488139-22-000063
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		5
    CONFORMED PERIOD OF REPORT:	20211231
    FILED AS OF DATE:		20220408
    DATE AS OF CHANGE:		20220408

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Ameresco, Inc.
    		CENTRAL INDEX KEY:			0001488139
    		STANDARD INDUSTRIAL CLASSIFICATION:	CONSTRUCTION SPECIAL TRADE CONTRACTORS [1700]
    		IRS NUMBER:				043512838
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-34811
    		FILM NUMBER:		22815416

    	BUSINESS ADDRESS:
    		STREET 1:		111 SPEEN STREET
    		CITY:			FRAMINGHAM
    		STATE:			MA
    		ZIP:			01701
    		BUSINESS PHONE:		508-661-2200

    	MAIL ADDRESS:
    		STREET 1:		111 SPEEN STREET
    		CITY:			FRAMINGHAM
    		STATE:			MA
    		ZIP:			01701
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>a2022noticeandproxystateme.htm
    <DESCRIPTION>2022 NOTICE AND PROXY
    <TEXT>
    Document 1 - file: a2022noticeandproxystateme.htm

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

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

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>dcssignature1a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: dcssignature1a.jpg

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

    </DOCUMENT>
    </SEC-DOCUMENT>