Vice Admiral Nils Oscar Jakob Krokstedt (12 October 1908 – 13 December 1985) was a Swedish Navy officer.

[1] He had an older sister, Astrid Krokstedt (1906–1981), who was first ombudsman in the Swedish Nurses’ Association (Svensk sjuksköterskeförening),[2] and two younger ones, Signe Olga Hermanna (1910–1932), and Karin Sigrid Elisabeth (born 1917).

[3] Krokstedt passed studentexamen in Visby in 1926[4] and came to the Swedish Navy as a sea cadet in 1927 and was later platoon leader in the Cabin Boy Corps (Skeppsgossekåren) in Karlskrona.

[1] Over the years, Krokstedt served great deal of time on warships, commanding patrol boats, minesweepers and destroyers.

[4] When Krokstedt retired, he fulfilled a dream by studying Swedish literary science at Stockholm University at an academic level.

At the commemoration in May 1984 of the af Chapman, former quartermaster Krokstedt was the one who, under salute, boarded the now hostel and received the eleven jubilant crews.