U 15
U 15 stands for:
- an age group in sports; see age and performance classes (sport)
- German U15 , an association of universities in Germany
- U15 Group of Canadian Research Universities , an association of Canadian universities
U 15 denotes the following submarines:
- SM U 15 (1912–1914), a submarine of the German Imperial Navy
- U 15 (kuk Marine) (1915–1919), a submarine of the Austro-Hungarian Navy
- U 15 (Kriegsmarine) (1935–1940), a submarine of the German Kriegsmarine
- U 15 (Bundeswehr) (1974–2010), a submarine of the German Navy
U15 denotes the following underground lines:
- U-Bahn line 15 (Berlin) (discontinued, the course of the line corresponded to that of today's U-Bahn line 1 (Berlin) )
- Tram line U15 (Stuttgart), see Stadtbahn Stuttgart
