The following ships are named Queen Mary:
- HMS Queen Mary, a battlecruiser of the Royal Navy entered service in 1913 and sank at the Battle of Jutland in 1916
- TS Queen Mary, a Clyde steamer in service 1933–1977, now retired and as of 2023 under restoration on the River Clyde in Scotland, United Kingdom
- RMS Queen Mary, a Cunard Line ocean liner in service 1936–1967, now retired and used as a hotel in Long Beach, California, United States
- RMS Queen Mary 2, a Cunard Line ocean liner that entered service in 2004.
