One ship of the Royal Navy has borne the name HMS Duff, whilst another was planned:
- HMS Duff was to have been a Captain-class frigate. She was however retained by the US Navy as the Evarts-class destroyer escort USS LeHardy.
- HMS Duff (K352) was a Captain-class frigate, previously USS Lamons. She was launched in 1943, returned to the US Navy in 1945 and scrapped in 1946.
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.