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Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 05, 2026
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-33975  
Entity Registrant Name United States Gasoline Fund, LP  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 20-8837263  
Entity Address, Address Line One 1850 Mt. Diablo Boulevard, Suite 640  
Entity Address, City or Town Walnut Creek  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94596  
City Area Code 510  
Local Phone Number 522-9600  
Title of 12(b) Security Shares of United States Gasoline Fund, LP  
Trading Symbol UGA  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   1,150,000
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0001396878  
Current Fiscal Year End Date --12-31