HMS Glamorgan was a County-class destroyer of the Royal Navy with a displacement of 5,440 tonnes. The ship was built by Vickers-Armstrongs in Newcastle Upon Tyne and named after the Welsh county of Glamorgan.

The County class was a class of British guided missile destroyers, the first such warships built by the Royal Navy. Designed specifically around the Seaslug anti-aircraft missile system, the primary role of these ships was area air defence around the aircraft carrier task force in the nuclear-war environment.