Two ships of the Royal Navy have been named HMS Westminster after the City of Westminster; or the Duke of Westminster:
was a W-class destroyer launched in 1918 and sold in 1947. She was scrapped in 1948. was a Type 23 frigate launched in 1992 and out of service 2024. She was scrapped in 2026.
Battle honours Ships named Westminster have earned the following battle honours: North Sea 1939–45 English Channel 1943