HMS Amphitrite was a 24-gun Porcupine-class sixth-rate post ship of the Royal Navy. She served during the American Revolution primarily in the economic war. On the one hand she protected the trade by capturing or assisting at the capture of a number of privateers, some of which the Royal Navy then took into service. On the other hand, she also captured many American merchant vessels, most of them small. Unfortunately, Amphrite was wrecked early in 1794.