Admiral Sir Harold Thomas Coulthard Walker KCB (18 March 1891 – 25 December 1975) was a Royal Navy officer who commanded the 3rd Battle Squadron.

He served in World War I and saw action during the Zeebrugge Raid in 1918, losing an arm.

[1] He became Deputy Director of Training and Staff Duties at the Admiralty in 1936, commanding officer of the battlecruiser HMS Hood in 1938 and commanding officer of the battleship HMS Barham in 1939.

He also served in World War II becoming Commodore at Portsmouth Dockyard in 1940 and Director of Personal Services at the Admiralty in 1941.

After the War he became Commander of British Naval Forces Germany in 1946 before retiring in 1947.