Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2022	Jun. 30, 2021
Cover [Abstract]
Entity Registrant Name	UNITED STATES ANTIMONY CORPORATION
Entity Central Index Key	0000101538
Document Type	10-K
Amendment Flag	false
Entity Voluntary Filers	No
Current Fiscal Year End Date	--12-31
Entity Well Known Seasoned Issuer	No
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Document Period End Date	Dec. 31, 2021
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Entity Common Stock Shares Outstanding		106,240,361
Entity Public Float			$ 31,287,606
Entity File Number	001-08675
Document Annual Report	true
Document Transition Report	false
Entity Incorporation State Country Code	MT
Entity Tax Identification Number	81-0305822
Entity Interactive Data Current	Yes
Entity Address Address Line 1	P.O. Box 643
Entity Address City Or Town	Thompson Falls
Entity Address State Or Province	MT
City Area Code	406
Local Phone Number	827-3523
Security 12b Title	Common stock, $0.01 par value
Trading Symbol	UAMY
Security Exchange Name	NYSEAMER
Entity Address Postal Zip Code	59873
Auditor Name	Assure CPA, LLC
Auditor Location	Spokane, Washington
Auditor Firm Id	444