The World Athletics U20 Championships is a biennial world championships for the sport of athletics organised by the World Athletics, contested by athletes in the under-20 athletics age category (19 years old or younger on 31 December in the year of the competition.
Hind Dehiba Chahyd is a Moroccan-French runner who specializes in the 1500 metres.
Asbel Kipruto Kiprop is a Kenyan middle-distance runner, who specialises in the 1500 metres. He was awarded the 1500 m gold medal at the 2008 Summer Olympics after the original winner, Rashid Ramzi, tested positive for doping. Kiprop has won three World Championship titles in the event, in 2011, 2013 and 2015. Kiprop failed his own doping test in November 2017 and received a four-year doping ban.
David Lekuta Rudisha, MBS is a Kenyan middle-distance runner who specialized in the 800 metres. He is a two-time back-to-back Olympic champion from the 2012 London and 2016 Rio Olympics, a two-time World champion from the 2011 and 2015 World Championships in Athletics, and world record holder at the event with a time of 1:40.91 set at the 2012 London Games on 9 August 2012. Rudisha is the first and only person to ever run 800 metres under 1:41, and he holds the three fastest, six of the eight fastest, and half of the twenty fastest times ever run in this event.
Pamela Jelimo is a Kenyan middle-distance runner, specialising in the 800 metres. She won the gold medal in 800 metres at the 2008 Olympics in Beijing at the age of 18. She is the first Kenyan woman to win an Olympic gold medal and also the first Kenyan to win the Golden League Jackpot. She holds both the 800 m world junior record and the senior African record over the same distance. Jelimo is also one of the youngest women to win an Olympic gold medal for Kenya.
Mokgadi Caster Semenya OIB is a South African middle-distance runner and winner of two Olympic gold medals and three World Championships in the women's 800 metres. She first won gold at the World Championships in 2009 and went on to win at the 2016 Olympics and the 2017 World Championships, where she also won a bronze medal in the 1500 metres. After the doping disqualification of Mariya Savinova, she was also awarded gold medals for the 2011 World Championships and the 2012 Olympics.
Nijel Carlos Amilfitano Amos is a Botswana middle-distance runner who competes in the 800 metres. He won the silver medal at the 2012 London Olympics, which was Botswana's first ever Olympic medal. Amos claimed gold medals at the 2014 Commonwealth Games and 2015 All-Africa Games. At the African Championships in Athletics, he took golds in 2014, 2016 and 2018.
Pierre-Ambroise Bosse is a French track and field athlete specializing in middle-distance running, and in particular the 800 metres event.
Eunice Jepkoech Sum is a Kenyan middle-distance runner who specializes in the 800 metres. She was the 2013 World champion and won the bronze medal in 2015. Sum took a silver and a gold at the 2012 and 2014 African Championships in Athletics respectively. She was also 2014 Commonwealth Games gold medallist and a three-time successive Diamond League winner in 2013–15.
Faith Chepngetich Kipyegon is a Kenyan middle- and long-distance runner. Kipyegon is the current world record holder for the 1500 metres and mile, both set in 2023, and the former world record holder for the 5000 metres. At the 2016 Rio de Janeiro Olympics and the 2020 Tokyo Olympics, Kipyegon won a gold medal in the 1500 m. She also won a gold medal in the 1500 m at the 2017, 2022 and 2023 World Athletics Championships and in the 5000 m at the 2023 World Athletics Championships.
Laura Muir is a Scottish middle- and long-distance runner. She is the 2020 Tokyo Olympic silver medallist in the 1500 metres, having previously finished seventh in the event at the 2016 Rio Olympics. Muir won the bronze medal at the 2022 World Championships, and has three other top five placings in 1500 m finals at the World Athletics Championships, finishing fifth in 2015, fourth in 2017 and fifth in 2019. She is a two-time European 1500 m champion from 2018 and 2022 as well as the 2022 Commonwealth Games 1500 m champion and 800 metres bronze medallist.
Ruth Jebet is a Kenyan-born long-distance runner and steeplechase specialist who competes internationally for Bahrain. She was the world record holder and was the 2016 Olympic gold medalist in the 3000 metres steeplechase, both achieved before turning 20. In 2018 she was suspended for testing positive for EPO.
Gudaf Tsegay Desta is an Ethiopian middle- and long-distance runner. She is the current world record holder on 5000 m (14:00.21), set at the 2023 final Diamond League event, the Prefontaine Classic in Eugene, Oregon. Eugene is also where she won the World Athletics Championships on 5000 m in 2022. At the World Athletics Championships, Tsegay also won the gold medal for 10,000 metres in 2023; a bronze for the 1500 metres in 2019, and silver in 2022. She is the 2020 Tokyo Olympic bronze medallist in the women's 5000 metres. She is a two-time World Indoor Championship 1500 m medallist, claiming bronze in 2016 and gold in 2022. She is also the world indoor record holder for the 1500 m, setting previously in this event world under-18 (current) and U20 (former) records.
Agnes Jebet Tirop was a Kenyan professional long-distance runner. She won bronze medals in the 10,000 metres at the 2017 and 2019 World Athletics Championships. At the 2015 IAAF World Cross Country Championships, Tirop became the second-youngest ever gold medallist in the women's race after Zola Budd. At the time of her death in 2021, she was the world-record holder in the 10 kilometres women's only event.
Nicholas Kiplagat Bett was a Kenyan track and field athlete who competed in the 400 metres hurdles. His personal best for the event is 47.79 seconds. He was a world champion in the event, having won in 2015, and a two-time bronze medallist at the African Championships in Athletics. He died in a road accident in Kenya at the age of 28.
The 1500 metres at the World Championships in Athletics has been contested by both men and women since the inaugural edition in 1983. It is the second most prestigious title in the discipline after the 1500 metres at the Olympics. The competition format typically has two qualifying rounds leading to a final between twelve athletes. It is one of two middle-distance running events on the programme, alongside the World Championship 800 metres.
Margaret Nyairera Wambui is a Kenyan middle-distance runner specialising in the 800 metres.
Aron Kifle Teklu is an Eritrean long-distance runner. He is the bronze medallist from the 2018 World Half Marathon Championships in Valencia. Aron is also the silver medallist in the 10000m from both the 2016 World U20 Championships and the 2019 All-African Games.
Alice Aprot Nawowuna is a Kenyan long-distance runner. She was the gold medallist in the 10,000 metres at the 2015 African Games, where she also won the bronze medal in the 5000 metres. Aprot claimed gold and silver in the 10,000 m at the 2016 and 2018 African Championships in Athletics respectively. She earned the silver medal for the senior women's race at the 2017 World Cross Country Championships.
Nagmeldin "Peter" Bol is an Australian middle-distance runner who competes in the 800 metres. He represented Australia at the 2016 Rio Olympics, placed fourth at the 2020 Tokyo Olympics and won the silver medal at the 2022 Commonwealth Games.
Kenya 
