HMS K4 was a British K-class submarine built by Vickers in Barrow-in-Furness.

She was laid down on 28 June 1915 and commissioned on 1 January 1917, one year before the end of World War I.

[4] There is a blue plaque on the wall of his home in the town of Cromer in Norfolk.

K4 was lost on 31 January 1918 during the night time fleet exercises later known as the Battle of May Island (Operation E.C.1) when she was attached to the 13th Submarine Flotilla.

This article about a specific naval submarine of the United Kingdom is a stub.