WThe 2013 African Junior Athletics Championships was the eleventh edition of the biennial, continental athletics tournament for African athletes aged 19 years or younger. It was held at the Germain Comarmond Stadium in Bambous, Mauritius from 29 August – 1 September. A total of 223 athletes from 29 nations competed. Neither pole vault event was held, due to a lack of entries, and the decathlon and heptathlon competitions were also not contested.
WThe 2013 African Youth Athletics Championships were the first edition of the biennial athletics competition for African athletes aged fifteen to seventeen. It was held in Warri, Nigeria, on 28–31 March. A total of 40 events were originally scheduled but only 36 went ahead, 17 for boys and 19 for girls.
WThe 2nd Asian Youth Games were held in Nanjing, China from August 16–24, 2013. Just like the inaugural edition, the games served as a dress-rehearsal for the upcoming 2014 Summer Youth Olympics, which was also held in the same city.
WThe 2013 Asian Youth Para Games, officially known as the 2nd Asian Youth Para Games, was an Asian youth disabled multi-sport event held in Kuala Lumpur, Malaysia from 26 to 30 October 2013. Around 1200 athletes from 29 participating nations participated at the games which featured 14 sports.
WThe 2013 Australian Youth Olympic Festival was the fifth edition of the Australian Youth Olympic Festival. It was held from 16–20 January 2013.
WThe 2013 BWF World Junior Championships were held in Bangkok, Thailand from October 23 to November 3, 2013.
WThe 15th Central American and Caribbean Age Group Championships in Athletics were hosted by the Curaçaose Atletiek Bond (CAB), and were held at the Sentro Deportivo Korsou in Brievengat, Curaçao between July 29–30, 2013.
WThe 2013 European Athletics Junior Championships was the 22nd edition of the biennial athletics competition between European athletes in under twenty. It was held in Rieti, Italy from 18 to 21 July.
WThe 2013 European Athletics U23 Championships was the 9th edition of the biennial athletics competition between European athletes under the age of twenty-three. It was held in Tampere, Finland from 10 to 14 July.
WThe 2013 European Youth Olympic Winter Festival was an international multi-sport event held between 17 and 22 February 2013, in Braşov, Romania, with some of the events also held in Râșnov, Predeal and Fundata. It was the 11th edition of the European Youth Olympic Winter Festival.
WThe 2013 European Youth Summer Olympic Festival was held in Utrecht, Netherlands, between 14 and 19 July 2013.
WThe 2013 FIBA Under-19 World Championship for Women was hosted by Lithuania from July 18 until July 28, 2013.
WThe 2013 Leeward Islands Junior Championships in Athletics took place on June 1, 2013. The event was held at the A. O. Shirley Recreation Ground in Road Town, Tortola, British Virgin Islands. Detailed reports were published.
WThe 40th South American Junior Championships in Athletics were held from October 18–20, 2013 at the Estadio Jaime Zapata in Resistencia, Chaco, Argentina.
WThe 2013–14 Grand Prix of Figure Skating Final was an international figure skating competition in the 2013–14 season, held together with the ISU Junior Grand Prix Final. The combined event was the culmination of two international series — the Grand Prix of Figure Skating and the Junior Grand Prix.
WThe 2013 Men's Hockey Junior World Cup was the 10th edition of the Hockey Junior World Cup for men, an international field hockey tournament. It was held between 6–15 December 2013 in New Delhi, India.
WThe 2013 Women's Hockey Junior World Cup was the seventh edition of the Women's Hockey Junior World Cup, held from 27 July to 4 August 2013 in Mönchengladbach, Germany.
WThe 2013 IRB Junior World Rugby Trophy was the sixth annual international rugby union competition for under-20 national teams, second-tier world championship.
WThe 2013 Youth Parapan American Games were a multi-sport event held from 14 to 19 October 2013 in Buenos Aires, Argentina. They were the third edition of the Youth Parapan American Games and they were organized by the Ministry of Social Development, the Argentinian Paralympic Committee (COPAR), the ENARD and the International Paralympic Committee.
WThe 2013 IRB Junior World Championship was the sixth annual international rugby union competition for Under 20 national teams. The event was organised in France by rugby's governing body, the IRB. A total of twelve nations played in the tournament. South Africa went into the tournament as defending champions, after winning the tournament for the first time in 2012. England were crowned the 2013 champions for the first time after defeating Wales 23 - 15 in the final on the 23 June at Stade de la Rabine in Vannes.
WThe 2013 FIBA Asia Under-16 Championship for Women is the qualifying tournament for FIBA Asia at the 2014 FIBA Under-17 World Championship for Women. The tournament was held in Colombo, Sri Lanka from November 23 to November 30. Sugathadasa Indoor Stadium was the main venue for the entire tournament.