Gustav Kleikamp (born 8 March 1896 in Fiddichow an der Oder; died 13 September 1952 in Mülheim an der Ruhr) was a German naval officer, and a Vizeadmiral in Nazi Germany's Kriegsmarine.
On 1 April 1913, Kleikamp entered the Imperial German Navy as a Seekadett on SMS Vineta. After basic training, he transferred to Marineschule Mürwik on 3 April 1914. After outbreak of World War I, he was posted as a communications officer to SMS Derfflinger, where he received promotion to Leutnant zur See in 1915.
From March 1918 he attended Ubootschule and later served as watch officer on SM U-9 until October 1918, when he became clerical officer of the 1. U-Kreuzerflottille until the end of the year.
Kleikamp remained with the navy after the collapse of monarchy in November 1918, serving in Marine-Brigade Ehrhardt. He received provisional promotion to Oberleutnant zur See on 7 January 1920, which was confirmed on 14 May 1921.
On 1 October 1920, Kleikamp was posted on Hamburg as communications and watch officer. On 4 December 1921 he was transferred to the pre-dreadnought battleship Braunschweig in the same capacity, where he served until he was given command of the German minesweeper M 113 on 1 October 1922.
After a year as commanding officer, Kleikamp joined the faculty at the Marinenachrichtenschule on 1 October 1923. Having received promotion to Kapitänleutnant in 1925, he joined the battleship Hannover on 24 September 1926 as Rollenoffizier. When Hannover was put out of service, he transferred to Schlesien, the new flagship of Marinestation Nordsee, in the same role.