Vice Admiral Sir Geoffrey Blake, KCB, DSO (16 September 1882 – 18 July 1968) was an officer in the Royal Navy who served as Fourth Sea Lord from 1932 to 1935.

[2] He served in the First World War and at the Battle of Jutland, as gunnery commander aboard HMS Iron Duke.

[2] He became Fourth Sea Lord and Chief of Supplies and Transport in 1932 and Vice Admiral commanding the Battlecruiser Squadron and second-in-command of the Mediterranean Fleet with his flag in HMS Hood in 1936.

[2] Blake presided over the first board of enquiry into the sinking of Hood in 1941; the conduct of the inquiry was criticised as no verbatim record of witnesses' testimony was kept.

Blake also served in the Second World War as an Additional Assistant Chief of Naval Staff from 1940 and as Flag Officer, Liaison to the United States Navy in Europe from 1942 to 1945.