HMS Parker (originally Frobisher) was a Parker-class flotilla leader of the British Royal Navy, and the lead ship of her class.

In February 1915, the British Admiralty ordered two Parker-class flotilla leaders (i.e. large destroyers intended to lead flotillas of smaller destroyers in action) under the Fourth Emergency War Construction Programme, Parker (originally to be called Frobisher but renamed before the ship was launched) and Grenville, from the Birkenhead shipyard Cammell Laird.

[2] 515 long tons (523 t) of oil fuel were carried, giving a range of 4,290 nautical miles (7,950 km; 4,940 mi) at 15 knots (28 km/h; 17 mph).

[9][10] On commissioning, Parker joined the 15th Destroyer Flotilla of the Grand Fleet at Scapa Flow as leader with sister ship Grenville.

Despite these countermeasures, the two German light cruisers Bremse and Brummer managed to evade the patrols and attacked the regular convoy between Norway and Britain on 17 October, sinking nine merchant ships and two destroyers, Mary Rose and Strongbow before returning safely to Germany.

[20] Parker was placed on the disposal list in February 1921 and was sold as part of a batch of nine destroyers to the ship breakers John Cashmore Ltd on 15 November 1921.