The fourth HMS Comus was a C-class light cruiser of the Royal Navy that saw service in World War I.

Commissioned into service in the Royal Navy on 15 May 1915, Comus was assigned to the 4th Light Cruiser Squadron in the Grand Fleet.

She and the destroyer HMS Munster sank the Imperial German Navy merchant raider Greif in the North Sea on 29 February 1916, and she fought in the Battle of Jutland on 31 May-1 June 1916[4] under the command of Captain Alan Hotham.

[5] After the conclusion of World War I, Comus served in the 1st Light Cruiser Squadron from March to April 1919, then underwent a refit at Rosyth, Scotland.

[4] Comus left the reserve in September 1925 to commission for service in the 2nd Light Cruiser Squadron in the Atlantic Fleet.