Hans Howaldt (12 November 1888, Kiel – 6 September 1970) was a successful and highly decorated German U-boat commander in the Kaiserliche Marine during World War I and also active in World War II. By the end of World War I he was promoted Kapitänleutnant.
As a sportsman, Hans Howaldt won Bronze in the international 8 Metre class sailing at the 1936 Summer Olympics on the Bay of Kiel as skipper of Germania III, a keelboat designed and built by Abeking & Rasmussen and owned by crew-member Alfried Krupp von Bohlen und Halbach.