Several ships of the Royal Navy have been named HMS Euryalus after Euryalus, the character from Greek mythology, one of the Argonauts.

HMS Euryalus (F15) was a Leander-class frigate of the Royal Navy (RN). Like the rest of the class, Euryalus was named after a figure of mythology. Euryalus was built by Scotts Shipbuilders of Greenock.

HMS Euryalus was a Dido-class cruiser of the Royal Navy. She was built at Chatham Dockyard UK), with the keel being laid down on 21 October 1937. She was launched on 6 June 1939, and commissioned 30 June 1941.

HMS Euryalus was a 35-gun wooden screw frigate of the Royal Navy. She was launched at Chatham in 1853, displaced 2,371 tons and had a complement of 515.

HMS Euryalus was a Royal Navy frigate of 36 guns, built at Bucklers Hard and launched in 1803. In 1805, captained by Henry Blackwood, she led the squadron of frigates watching Cádiz prior to the Battle of Trafalgar. The Franco-Spanish fleet left Cadiz on 20 October and the frigates shadowed them until they were met and destroyed by the main Royal Navy fleet.