Three vessels of the Royal Navy have been named HMS Calder after Admiral Sir Robert Calder, a contemporary of Admiral Nelson:
HMS Calder was to have been a Captain-class frigate launched at Mare Island in 1942, but the vessel was retained by the United States, and commissioned into the United States Navy as USS Gilmore.
HMS Calder was to have been another Captain-class frigate launched at Mare Island in 1942, but the vessel was retained by the United States, and commissioned into the United States Navy as USS Finnegan.
HMS Calder was another Captain-class frigate, launched at Bethlehem Hingham Shipyard on 27 February 1943 and provided to the Royal Navy under Lend-Lease. It was returned to the United States in October 1945 and scrapped in 1948.
