HMCS Granby (J264) was a Bangor-class minesweeper that served in the Royal Canadian Navy during World War II. She was commissioned on 2 May 1942 and paid off on 31 July 1945. She was recommissioned from 1953–1966 as a diving support ship. She was used, along with HMCS Digby, in 1953 on Lake Ontario to test the Royal Canadian Navy's DATAR system.