HMS Raglan was a First World War Royal Navy Abercrombie-class monitor, which was sunk during the Battle of Imbros in January 1918.

On 3 November 1914, Charles M. Schwab of Bethlehem Steel offered Winston Churchill, then First Lord of the Admiralty, the use of eight 14-inch (356 mm)/45 cal BL MK II guns in twin gun turrets, originally destined for the Greek battleship Salamis.

These turrets could not be delivered to the German builders, due to the British blockade.

Raglan was laid down at the Harland & Wolff Ltd shipyard at Govan on 1 December 1914.

On 20 January 1918,[1] while the battleships Agamemnon and Lord Nelson were absent, Raglan and other members of the Detached Squadron of the Aegean Squadron were attacked by the Turkish battlecruiser Yavuz Sultan Selim (formerly German battlecruiser SMS Goeben), the light cruiser Midilli (formerly German light cruiser SMS Breslau) and four destroyers.