Three ships of the Royal Navy have borne the name HMS St Mary or HMS St Marys:
was a cog in service with the Cinque Ports in 1299. was a ship purchased in 1626 and given away in 1628. HMS St Marys was a , previously the United States Navy USS Doran, which had been launched as . She was transferred to the Royal Navy in 1940 and was sold for scrapping in 1945.
See also