Two ships of the Royal Navy have borne the name HMS Ceanothus. Ceanothus comes from the Greek word keanthos, meaning a type of thistle.

• HMS Ceanothus (1917) was an Anchusa-class sloop launched in 1917. In 1921 she was transferred to the Royal Indian Marine and renamed HMINS Elphinstone. She was wrecked on 29 January 1925 off the Nicobar Islands.
• HMS Ceanothus (K486) was a modified Flower-class corvette launched in 1943. She was transferred in the same year to the Royal Canadian Navy and renamed HMCS Forrest Hill. She was sold for scrap in 1948.

• Colledge, J. J.; Warlow, Ben (2006) [1969]. Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8.

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.