Submission	Mar. 30, 2026
Submission [Line Items]
Central Index Key	0001405513
Registrant Name	United States 12 Month Natural Gas Fund, LP
Registration File Number	333-263572
Form Type	R 424I
Submission Type	424I
Fee Exhibit Type	EX-FILING FEES
Issuer Name	United States 12 Month Natural Gas Fund, LP
Street 1	1850 MT. DIABLO BLVD.
Street 2	SUITE 640
City	WALNUT CREEK
State or Country Code	CA
Zip Code	94596
Reporting FY End Date	Dec. 31, 2025