HMS Sandfly was an Acheron-class destroyer of the Royal Navy that served during World War I and was sold for breaking in 1921.

[3] She was present on 28 August 1914 at the Battle of Heligoland Bight, detached from the First Destroyer Flotilla along with Badger, Beaver and Jackal.

[6] On 24 January 1915, the First Destroyer Flotilla, including Sandfly, were present at the Battle of Dogger Bank, led by the light cruiser HMS Aurora.

[7] Her crew shared in the prize money for the German armoured cruiser SMS Blücher.

[10] On 31 August 1917 Sandfly went to the aid of SS Miniota of the Canadian Pacific Line when she was torpedoed by SM U-19[11] 30 nautical miles (56 km) off Start Point.