WThe 2015 African Junior Athletics Championships was the twelfth edition of the biennial, continental athletics tournament for African athletes aged 19 years or younger. It was held at the Addis Ababa Stadium in Addis Ababa, Ethiopia from 5–8 March. It was the first time that Ethiopia hosted the event and followed on from the 2008 African Championships in Athletics, which was hosted at the same venue.
WThe 2015 Arab Under 17 Women's Cup is the 1st edition of the Arab U-17 Women's Cup for national women's football teams for under 17 affiliated with the Union of Arab Football Associations (UAFA). The tournament was hosted by Qatar between 15 and 23 February 2015. The winner was Lebanon team, marked for the first time Lebanon won a major tournament.
WThe 2015 Asian Youth Athletics Championships was the first edition of the biennial, continental athletics competition for Asian athletes aged fifteen to seventeen. It was held in Doha, Qatar from 8–11 May. A total of forty events were contested, with the events divided evenly between the sexes. The event programme mirrored that of the previous IAAF World Youth Championships in Athletics, with the exception of a boy's decathlon, rather than the octathlon.
WThe 2015 BWF World Junior Championships is the seventeenth tournament of the BWF World Junior Championships. It is held in Lima, Peru at the Centro de Alto Rendimiento de La Videna between 4–15 November 2015.
WThe 2015 Commonwealth Youth Games was the fifth Commonwealth Youth Games which started in 2000. They were held in Apia, the capital of Samoa. Samoa were the only bidders for the Games.
WThe 2015 European Athletics Junior Championships were the 23rd edition of the biennial European U20 athletics championships. They were held in Eskilstuna, Sweden from 16 July to 19 July.
WThe 2015 European Athletics U23 Championships was the 10th edition of the biennial athletics competition between European athletes under the age of twenty-three. It was held in Tallinn, Estonia from 8 to 12 July.
WThe 2015 European Youth Olympic Winter Festival was held in Vorarlberg, Austria and Liechtenstein between 25 and 30 January 2015. It was the first time that two countries become hosts in a European Youth Olympic Festival.
WThe 2015 European Youth Summer Olympic Festival was held in Tbilisi, Georgia, between 26 July and 1 August 2015.
WThe 2015 Pan American Junior Championships was the eighteenth edition of the biennial track and field competition for under-20 athletes from the Americas, organised by the Association of Panamerican Athletics. It was held in Edmonton, Alberta, Canada, at the Foote Field from 31 July to 2 August.
WThe 41st South American Junior Championships in Athletics were held in Cuenca, Ecuador, between May 30–31, 2015.
WThe 2015 World Junior Curling Championships was held from February 28 to March 8 at the Tondiraba Ice Rink in Tallinn, Estonia.
WThe 2015 World Youth Championships in Athletics was the ninth edition of the biennial international athletics competition for youth (under-18) athletes. The five-day competition took place between 15 and 19 July at the Estadio Olímpico Pascual Guerrero stadium in Cali, Colombia. Eligible athletes were aged 16 or 17 on 31 December 2015.
WThe 2015–16 Grand Prix of Figure Skating Final and ISU Junior Grand Prix Final took place from December 10 to 13, 2015 in Barcelona, Spain. Hosted by Barcelona for the second year in a row, the combined event was the culmination of two international series — the Grand Prix of Figure Skating and the Junior Grand Prix. Medals were awarded in the disciplines of men's singles, women's singles, pair skating, and ice dancing on the senior and junior levels. For the first time, medals were also awarded in synchronized skating.
WThe 2016 AFC U-23 Championship qualification was a men's under-23 football competition which decided the participating teams of the 2016 AFC U-23 Championship. Players born on or after 1 January 1993 were eligible to compete in the tournament.
WThe 2015 African Youth Athletics Championships was the second edition of the biennial athletics competition for African athletes aged fifteen to seventeen, It was held in Reduit, Mauritius from 23–26 April. Mauritius had hosted the 2013 African Junior Athletics Championships two years earlier. A total of 38 events, 18 by boys and 20 by girls, were contested at the competition.
WThe 2015 FIL Rathbones Women's U-19 World Lacrosse Championship was the sixth FIL Women's Under-19 World Lacrosse Championship, an international field lacrosse tournament that is held every four years and is sponsored by the Federation of International Lacrosse. It took place from 23 July to 1 August 2015 in Edinburgh, Scotland. The games were played at the University of Edinburgh – Peffermill Playing Fields. The Canadian team won its first world championship at this event in defeating the United States in the final.
WThe 2015 World Rugby Under 20 Championship was the eighth annual international rugby union competition for Under 20 national teams. The event was organised for the second time in Italy by rugby's governing body, World Rugby. Twelve nations played in the tournament, with matches hosted by Parma, Viadana, Calvisano and Cremona, host city of the final match. England went into the tournament as the two-time defending champions after they successfully defended their title in the 2014 IRB Junior World Championship. This was the first U20 Championship held after the sport's governing body changed its name from the International Rugby Board to the current World Rugby.
WThe 2015 FIBA Asia Under-16 Championship for Women was the qualifying tournament for FIBA Asia at the 2016 FIBA Under-17 World Championship for Women. The tournament was held in Medan, Indonesia from August 2 to 9.