The British 13th Destroyer Flotilla, or Thirteenth Destroyer Flotilla, was a naval formation of the Royal Navy from November 1915 – November 1918 and again from September 1939 to January 1944.

The flotilla was first formed in November 1915 and was assigned to the Grand Fleet.

It remained with the Grand Fleet until November 1918 and was disbanded in March 1919.

[1] In September 1939 the flotilla was re-established and assigned to the North Atlantic Command at Gibraltar.

[2] On 29 January 1943 it was operating within the command as part of the Gibraltar Escort Force until 2 July 1943.