HMS Seagull (or Sea Gull) was the name vessel for the Seagull class of brig-sloops of the Royal Navy. She was launched on 1 July 1805 and saw active service under the British flag in Danish waters until 19 June 1808 when Dano-Norwegian forces sank her. The Danes raised her and refitted her for service in the Dano-Norwegian Navy, which she served until the end of the English Wars in 1814. She then was transferred to the Norwegians. She was finally decommissioned in 1817.