U 22
U 22 denotes several submarines:
- SM U 22 (1913–1918), a submarine of the German Imperial Navy
- U 22 (kuk Marine) (1916–1919), a submarine of the Austro-Hungarian Navy
- U 22 (Kriegsmarine) (1936–1940), a submarine of the German Kriegsmarine
- U 22 (Bundeswehr) (1974–2008), a submarine of the German Navy
