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.

Ships named Westminster have earned the following battle honours:

• North Sea 1939–45
• English Channel 1943

This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.