U15

• German submarine U-15, one of several German submarines
• U-15, a nickname for the Finnish curler Markku Uusipaavalniemi
• U-15, a subcategory used in Japanese junior idol products.
• U15, a line on the Berlin U-Bahn
• U15 Group of Canadian Research Universities
• U15, a group of 15 research-intensive universities in Germany
• For the U15 Bandy World Championship, see Youth Bandy World Championship