Two ships of the Royal Navy have been named HMS Westminster after the City of Westminster; or the Duke of Westminster:
- HMS Westminster (L40) was a W-class destroyer launched in 1918 and sold in 1948.
- HMS Westminster (F237) is a Type 23 frigate launched in 1992 and currently in service.
Battle honours
editShips named Westminster have earned the following battle honours:
- North Sea 1939–45
- English Channel 1943