The 2019 IAAF World Athletics Championships (Arabic: بطولة العالم لألعاب القوى 2019) 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.
It was the first edition of the competition under its modified name, having previously been known as the World Championships in Athletics, and the last held before the IAAF assumed its new identity as World Athletics. It was also the first time the competition was in the Middle East and also the first time it ended in October. Due to the hot climate, there were no morning sessions and events were held in the late afternoon onward. Long-distance road events were scheduled to start around midnight local time. For the first time, sponsors of national teams were permitted to appear on the kit that the athletes compete in.