Exhibit 99.1

United States Oil Fund, LP

Monthly Account Statement

For the Month Ended December 31, 2017  

Statement of Income (Loss)
Income
Realized Trading Gain (Loss) on Futures	$	(10,115,030	)
Unrealized Gain (Loss) on Market Value of Futures		113,172,890
Dividend Income		156,623
Interest Income		1,970,515
ETF Transaction Fees		25,000
Total Income (Loss)	$	105,209,998
Expenses
General Partner Management Fees	$	799,623
Professional Fees		308,513
Brokerage Commissions		268,312
Non-interested Directors' Fees and Expenses		16,432
Prepaid Insurance Expense		12,328
NYMEX License Fee		26,654
SEC & FINRA Registration Expense		29,592
Total Expenses	$	1,461,454
Net Income (Loss)	$	103,748,544

Statement of Changes in Net Asset Value
Net Asset Value Beginning of Month 12/1/17	$	2,095,855,659
Additions (13,200,000 Shares)		153,514,597
Withdrawals (28,500,000 Shares)		(333,587,390	)
Net Income (Loss)		103,748,544
Net Asset Value End of Month	$	2,019,531,410
Net Asset Value Per Share (167,200,000 Shares)	$	12.08

To the Limited Partners of United States Oil Fund, LP:  

Pursuant to Rule 4.22(h) under the Commodity Exchange Act, the undersigned represents that, to the best of his knowledge and belief, the information contained in the Account Statement for the month ended December 31, 2017 is accurate and complete.

/s/ Stuart P. Crumbaugh

Stuart P. Crumbaugh

Chief Financial Officer

United States Commodity Funds LLC, General Partner of United States Oil Fund, LP  

United States Commodity Funds LLC

1999 Harrison Street, Suite 1530

Oakland, CA 94612