Two ships of the Royal Navy have borne the name HMS Sea Nymph:
- HMS Sea Nymph (1782) was an 8-gun cutter in service in 1782.
- HMS Sea Nymph (P223) was an S-class submarine launched in 1942 and scrapped in 1948.
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.