    <SEC-DOCUMENT>0001084991-20-000051-index.html : 20200615
    <SEC-HEADER>0001084991-20-000051.hdr.sgml : 20200615
    <ACCEPTANCE-DATETIME>20200615160946
    ACCESSION NUMBER:		0001084991-20-000051
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		5
    CONFORMED PERIOD OF REPORT:	20191231
    FILED AS OF DATE:		20200615
    DATE AS OF CHANGE:		20200615
    EFFECTIVENESS DATE:		20200615

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			NATURAL GAS SERVICES GROUP INC
    		CENTRAL INDEX KEY:			0001084991
    		STANDARD INDUSTRIAL CLASSIFICATION:	OIL, GAS FIELD SERVICES, NBC [1389]
    		IRS NUMBER:				752811855
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-31398
    		FILM NUMBER:		20963388

    	BUSINESS ADDRESS:
    		STREET 1:		404 VETERANS AIRPARK LANE
    		STREET 2:		SUITE 300
    		CITY:			MIDLAND
    		STATE:			TX
    		ZIP:			79705
    		BUSINESS PHONE:		(432) 262-2700

    	MAIL ADDRESS:
    		STREET 1:		404 VETERANS AIRPARK LANE
    		STREET 2:		SUITE 300
    		CITY:			MIDLAND
    		STATE:			TX
    		ZIP:			79705
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>proxy2020.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: proxy2020.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-1
    <SEQUENCE>2
    <FILENAME>a2020proxycard.htm
    <DESCRIPTION>EX-1
    <TEXT>
    Document 2 - file: a2020proxycard.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>a2020backproxycard1.jpg
    <TEXT>
    Document 3 - file: a2020backproxycard1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>a2020frontproxycard1.jpg
    <TEXT>
    Document 4 - file: a2020frontproxycard1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>a5yearchart1.jpg
    <TEXT>
    Document 5 - file: a5yearchart1.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>