USS Mercury
{{Italic title prefixed|3}}
USS Mercury may refer to:
- {{USS|Mercury|1776}} was a ketch authorized by the Continental Congress in 1776 and captured off the Grand Banks of Newfoundland by the Royal Navy 10 September 1780
- {{USS|Mercury|1781}} was a schooner built in 1781 and served the Continental Navy as a packet, but facts of her service are unknown
- {{USS|Mercury|1807}} was a revenue cutter launched 6 April 1807 and served the Revenue Cutter Service until 1820
- {{USS|Mercury|1861}} was a sidewheel steamer tug purchased and rebuilt by the US Navy in 1861 and decommissioned in 1870{{cite web |url=http://www.navsource.org/archives/09/86/86482.htm |title=USS Mercury |author= |date= |website=NavSource Online: "Old Navy" Ship Photo Archive |publisher=NavSource Naval History |access-date=February 12, 2019 |quote=}}
- {{USS|Mercury|ID-3012}} was originally the German SS Barbarossa seized by the US Navy and used to ferry troops during World War I
- {{USS|Mercury|AK-42}} was acquired by the US Navy 20 June 1941 and decommissioned 28 May 1959
- {{USNS|Mercury|T-AGM-21}} was a missile range instrumentation ship acquired by MSTS in 1965.