The 2019 IAAF World Athletics Championships was the seventeenth edition of the biennial, global athletics competition organised by the International Association of Athletics Federations (IAAF), since renamed World Athletics. It was held between 27 September and 6 October 2019 in Doha, Qatar, at the renovated multi-purpose Khalifa International Stadium, but reduced to 21,000 available seats. 1,772 athletes from 206 teams competed in 49 athletics events over the ten-day competition, comprising 24 events each for men and women, plus a mixed relay. There were 43 track and field events, 4 racewalking events, and 2 marathon road running events. The racewalking and marathon events were held in Doha Corniche.
Yemen has competed at the IAAF World Athletics Championships on fourteen occasions, and did not send a delegation for the 1991 and 2017 editions. Its competing country code is YEM. The IAAF treats the past participation of the Yemen Arab Republic (YAR) and South Yemen (PRY) as part of a united Yemen's history. The country has not won any medals at the competition and as of 2017 no Yemeni athlete has progressed beyond the first round of an event.
Vietnam has competed at the IAAF World Athletics Championships on eleven occasions, and did not send a delegation for the 1987, 1997, 2001, 2005, and 2007 editions. Its competing country code is VIE. The country has not won any medals at the competition and as of 2017 no Vietnamese athlete has progressed beyond the first round of an event.
Vanuatu has competed at every edition of the IAAF World Athletics Championships since its inception in 1983. Its competing country code is VAN. The country has not won any medals at the competition and as of 2017 no Vanuatuan athlete has progressed beyond the first round of an event.
The Solomon Islands has competed at the IAAF World Athletics Championships on thirteen occasions, competing in 1983 then every edition since 1995. Its competing country code is SOL. The country has not won any medals at the competition and as of 2022 no Solomon Islander athlete has progressed beyond the first round of an event.
Saint Vincent and the Grenadines has competed at every edition of the IAAF World Athletics Championships. Its competing country code is VIN. The country has not won any medals at the competition and as of 2017 none of the country's athletes has reached the final of an event. Sprinters Kineke Alexander and Natasha Mayers have both competed in a World Championships semi-final.
The United States Virgin Islands has competed at the IAAF World Athletics Championships on fifteen occasions, skipping the 2001 edition. It also competed at the 1976 World Championships in Athletics. Its competing country code is ISV. The country has not won any medals at the competition. As of 2017 the country's athletes have reached a final of an event on two occasions. Its best performance is fourth place, by Tabarie Henry in the 2009 men's 400 metres final.
Turkmenistan competed at the 2019 World Championships in Athletics in Doha, Qatar, from 27 September-6 October 2019, with their sole athlete, Irina Velihanova, competing in the women's 100m hurdles event.
United Arab Emirates has competed at the IAAF World Athletics Championships on thirteen occasions, taking part since 1993 and failing to send a delegation in 2003, 2005 and 2007. Its competing country code is UAE. The country has not won any medals at the competition and as of 2017 none of the country's athletes have competed in a final. The country's best performance at the championships was by Betlhem Desalegn, who reached the women's 1500 metres semi-finals in 2015.
Namibia competed at the 2019 World Athletics Championships in Doha, Qatar, from 27 September to 6 October 2019. The country's participation there marked its fifteenth appearance in the World Championships since its debut at the 1991 World Championships in Athletics. Namibia sent two athletes to the Championships, both of whom competed in the marathon events. Helalia Johannes became Namibia's first female medallist, and their first medallist in 26 years, when she won a bronze medal in the women's marathon. Tomas Hilifa Rainhold finished in 17th in the men's marathon.
Afghanistan has competed at the IAAF World Athletics Championships on seven occasions, and did not send a delegation from 1987 to 2001, and for the 2005 and 2019 championships. Its competing country code is AFG. The country has not won any medals at the competition and as of 2017 no Afghan athlete has progressed beyond the first round of an event.
Anguilla has competed at the IAAF World Athletics Championships on seventeen occasions, attending every edition since the 1983 World Championships in Athletics. Its competing country code is AIA. The territory has not won any medals at the competition. Its best performance is by Shara Proctor, who placed fifth in the women's long jump at the 2009 World Championships in Athletics. Proctor later won a World Championships silver medal while competing for Great Britain.
Algeria has competed at the IAAF World Athletics Championships on eighteen occasions, sending a delegation to every event since the 1983 edition. Its competing country code is ALG. The country has won six gold medals, two silver medals and three bronze medals at the competition. All eleven of its medals come from six athletes in distance track events. Noureddine Morceli won the men's 1500 metres titles in 1991, 1993 and 1995, while his female counterpart Hassiba Boulmerka won two golds and one bronze. Azzedine Brahmi won 1991 bronze in the men's 3000 metres steeplechase. Djabir Saïd-Guerni won the men's 800 metres bronze in 1999 before winning a gold medal in that event in 2003. In 2019, Taoufik Makhloufi won the silver in the men's 1500 metres, and in the subsequent edition, Djamel Sedjati won the silver in the men's 800 meters.
Andorra competed at the 2019 World Athletics Championships in Doha, Qatar, from 27 September–6 October 2019. Andorra had entered 1 athlete.
Angola has competed at the IAAF World Athletics Championships on fourteen occasions, and did not send a delegation for the 2009 and 2017 editions. Its competing country code is ANG. The country has not won any medals at the competition and as of 2017 no Angolan athlete has reached the top eight of an event. Its best performance is by João N'Tyamba, who placed thirteenth in the 1999 men's 10,000 metres final.
Aruba has competed at the World Athletics Championships on eleven occasions. It did not send a delegation for the 1983 championships or the editions from 2001 to 2009. Its competing country code is ARU. The country has not won any medals at the competition and as of 2019 no Aruban athlete has reached the top eight of an event. Its best performance is by Cornelia Melis, who placed 21st in the 1991 women's marathon.
Bermuda has competed at the IAAF World Athletics Championships on thirteen occasions, and did not send a delegation from 2003 to 2007. Its competing country code is BER. The country has won one silver medal at the competition, through Brian Wellman's performance at the 1995 World Championships in Athletics men's triple jump. Bermudan athletes have placed in the top eight of an event on six occasions.
The Cook Islands has competed at the IAAF World Athletics Championships on fifteen occasions, and did not send a delegation for the 1999 World Championships in Athletics. Its competing country code is COK. The country has not won any medals at the competition and as of 2017 no Cook Islands athlete has progressed beyond the first round of an event. Its best performance is by Tereapii Tapoki, who placed twentieth in women's discus throw qualifying in 2005.
China competed at the 2019 World Championships in Athletics in Doha, Qatar, from 27 September to 6 October 2019. A total of 69 athletes from China participated.
Armenia has competed at the IAAF World Athletics Championships on fourteen occasions, sending a delegation from 1993 onwards. Prior to 1993, its athletes participated as part of the Soviet Union team. Armenia's competing country code is ARM. The country has not won any medals at the competition and as of 2019 no Armenian athlete has placed within the top eight of an event. Its best performance is by Robert Emmiyan, who placed eleventh in the men's long jump final at the 1995 World Championships in Athletics. Emmiyan previously won a silver medal for the Soviet Union.
