    <SEC-DOCUMENT>0001193125-15-120710-index.html : 20150407
    <SEC-HEADER>0001193125-15-120710.hdr.sgml : 20150407
    <ACCEPTANCE-DATETIME>20150407080605
    ACCESSION NUMBER:		0001193125-15-120710
    CONFORMED SUBMISSION TYPE:	POS AM
    PUBLIC DOCUMENT COUNT:		10
    FILED AS OF DATE:		20150407
    DATE AS OF CHANGE:		20150407

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			United States 12 Month Natural Gas Fund, LP
    		CENTRAL INDEX KEY:			0001405513
    		STANDARD INDUSTRIAL CLASSIFICATION:	 [6221]
    		IRS NUMBER:				260431733
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		POS AM
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-185961
    		FILM NUMBER:		15754880

    	BUSINESS ADDRESS:
    		STREET 1:		1999 HARRISON STREET
    		STREET 2:		SUITE 1530
    		CITY:			OAKLAND
    		STATE:			CA
    		ZIP:			94612
    		BUSINESS PHONE:		(510) 522-9600

    	MAIL ADDRESS:
    		STREET 1:		1999 HARRISON STREET
    		STREET 2:		SUITE 1530
    		CITY:			OAKLAND
    		STATE:			CA
    		ZIP:			94612
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>POS AM
    <SEQUENCE>1
    <FILENAME>d882634dposam.htm
    <DESCRIPTION>POST-EFFECTIVE AMENDMENT NO. 3 - UNITED STATES 12 MONTH NATURAL GAS FUND, LP
    <TEXT>
    Document 1 - file: d882634dposam.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.1
    <SEQUENCE>2
    <FILENAME>d882634dex101.htm
    <DESCRIPTION>EXHIBIT10.1
    <TEXT>
    Document 2 - file: d882634dex101.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.1
    <SEQUENCE>3
    <FILENAME>d882634dex231.htm
    <DESCRIPTION>EXHIBIT 23.1
    <TEXT>
    Document 3 - file: d882634dex231.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.2.A
    <SEQUENCE>4
    <FILENAME>d882634dex232a.htm
    <DESCRIPTION>EXHIBIT 23.2(A)
    <TEXT>
    Document 4 - file: d882634dex232a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.2.B
    <SEQUENCE>5
    <FILENAME>d882634dex232b.htm
    <DESCRIPTION>EXHIBIT 23.2(B)
    <TEXT>
    Document 5 - file: d882634dex232b.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g882634g22l53.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g882634g22l53.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g882634g22x51.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g882634g22x51.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g882634g23d19.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g882634g23d19.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g882634g69c44.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g882634g69c44.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>g882634g82r96.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g882634g82r96.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>