Two ships of the Royal Navy have been named HMS Alyssum:
- HMS Alyssum (1915) was an Arabis-class sloop launched in 1915 and sunk in 1917
- HMS Alyssum (K100) was a Flower-class corvette launched in 1941 and transferred to the Free French Naval Forces on completion. She was sunk in 1942
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.