The hired armed schooner Sir Sidney Smith (or Sidney Smith) served the Royal Navy during the French Revolutionary Wars from 12 October 1799 to 13 October 1801. She was of 151 tons burthen (bm), and carried twelve 12-pounder carronades. She was named for Admiral Sidney Smith.
She brought a convoy into Plymouth on 15 October. Then, on 24 May 1801, while under the command of Lieutenant C. Patey (or Paty or Paloy), she sailed from Plymouth with dispatches for Egypt.
Because Sir Sidney Smith 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.
Readily available records do not reveal what happened to Sir Sidney Smith after the Navy ended her contract.