Five ships of the Royal Navy have borne the name HMS Trusty:
HMS Trusty was a 50-gun fourth rate launched in 1782, used as a troopship from 1799 and a prison ship from 1809, and broken up in 1815. Because Trusty served in the navy's Egyptian campaign (8 March to 2 September 1801), her officers and crew qualified for the clasp "Egypt" to the Naval General Service Medal, which the Admiralty issued in 1847 to all surviving claimants.
HMS Trusty was an Aetna-class ironclad floating battery launched in 1855 and broken up in 1864.
HMS Trusty was a tug launched in 1866, renamed in 1917 as HMS Trustful and broken up in 1920.
HMS Trusty was an S-class destroyer launched in 1918 and broken up in 1936.
HMS Trusty was a T-class submarine launched in 1941 and broken up in 1947.
