HMS Madagascar was a 38-gun Piémontaise-class frigate originally of the French Navy.

The British captured Néréide during the action of 20 May 1811, and commissioned her into the Royal Navy as HMS Madagascar.

Madagascar, Vengeur, and Lightning were in company on 6 March 1814 at the recapture of Diamond.

[Note 1] Shortly thereafter, Captain Bentinck Cavendish Doyle of Lightning transferred to take command of Madagascar.

In June 1814, Madagascar served in a flotilla under the command of Admiral Lord Cochrane, and carried General William Miller and his troops from Bordeaux to the Chesapeake Bay to reinforce General Ross in the War of 1812.1