HMS Constant was an Archer–class gun-brig of the Royal Navy, launched in 1801 for service against the French during the French Revolutionary and Napoleonic Wars. She was variously stationed in English home waters, the Baltic, the Caribbean, and off the coast of Spain, and was responsible for the capture of at least seven enemy vessels during her fifteen years at sea. The Royal Navy sold Constant at Chatham Dockyard in 1816.