Great Britain and Northern Ireland at the World Athletics Championships

Great Britain and Northern Ireland has participated in all the World Athletics Championships since the events beginning in 1983 as the IAAF World Championships in Athletics. The team also took part in the two minor championship events under the same name for non-Olympic disciplines in 1977 and 1980, without winning a medal. The team is 7th on the all time medal table

Mo Farah is the most successful British Athlete in championships history, as well as the most successful distance runner in the history of the championships with six gold and two silver medals split evenly between 5000 metres and 10,000 metres; only Usain Bolt has won more individual gold medals than Farah Jessica Ennis-Hill is the most successful British female athlete with three gold medals in heptathlon. Farah and Christine Ohuruogu, with two gold, a silver and five bronze medals are the most decorated British athletes in championships history with eight medals apiece. Great Britain's most successful event has been Heptathlon with five gold medals, and nine medals. The individual event with most different British gold medalists is the men's 1500 metres, won by three men; Steve Cram in 1983, Jake Wightman in 2022 and Josh Kerr in 2023.

By championships
* : ongoing