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Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 02, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Entity Registrant Name	United States Oil Fund, LP
Entity Central Index Key	0001327068
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Trading Symbol	USO
Entity Common Stock, Shares Outstanding		252,100,000

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