U20 or U-20 may refer to: * German submarine U-20 * U-20 Summit, an international summit for cities from the G-20 countries * An under-20 sports teams or competition including:Association football * FIFA U-20 World Cup * FIFA U-20 Women's World Cup * Category:Under-20 association football, one of many under-20 association football (soccer) teams and competitionIce hockey * IIHF World U20 Championship, an annual event organized by the International Ice Hockey Federation (IIHF) for national under-20 ice hockey teams from around the world This disambiguation page lists articles associated with the same title formed as a letter-number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article.