This article is about the ship. For information on the fictional character in Mervyn Peake's Gormenghast novels see Barquentine (Gormenghast).

A barquentine is a sailing ship with three or more masts, and with a square rigged foremast and only fore-and-aft rigged sails on the main, mizzen and any other masts. See also sail-plan. Related rigs are brigantine (2 masts), barque (square-rigged on all but the mizzen mast), and the sole instance of a vessel with 2 fore-and-aft rigged masts and 2 square-rigged (the Olympia).