U-15 may refer to one of the following German submarines.
In Japan, a, alternatively or, is primarily defined as a child or early teenager pursuing a career as a photographic model.
Markku Uusipaavalniemi (born 23 November 1966 in Karkkila) is a Finnish curler and former politician.
The U15 was a line on the Berlin U-Bahn.
The association German U15 e.V. is a coalition of fifteen major research-intensive and leading medical universities in Germany with a full disciplinary spectrum, excluding any defining engineering sciences.
The U15 Group of Canadian Research Universities (commonly shortened to U15) (U15 Regroupement des universités de recherche du Canada) is an association of 15 Canadian public research universities.
Bandy World Championship for youth teams are held in a number of age classes for boys and young men and in one age class for girls playing bandy.