HMS Cubitt (K512) was a Captain-class frigate of the British Royal Navy that served during World War II. The ship was laid down as a Buckley-class destroyer escort at the Bethlehem-Hingham Shipyard at Hingham, Massachusetts on 9 June 1943, with the hull number DE-83, and launched on 11 September 1943. The ship was transferred to the UK under Lend-Lease on 17 November 1943, and named after Captain J. Cubitt, a Navy officer who commanded the frigate Mary Rose in 1661.