One ship and one shore establishment of the Royal Navy have borne the name HMS Royal Arthur, in reference to the legendary King Arthur:
- HMS Royal Arthur (1891) was an Edgar-class armoured cruiser launched in 1891 and sold in 1921.
- HMS Royal Arthur (shore establishment) was a training centre established near Skegness between 1939 and 1946, and at Corsham between 1947 and 1993.
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.