Marathons at the World Athletics Championships

The marathon 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 global title in the discipline after the marathon at the Olympics. From 1997 to 2011 it hosted the World Marathon Cup team event. It currently forms part of the World Marathon Majors circuit, which includes the six top annual races. The competition format has separate men's and women's races, which both serve as a straight final. Participation typically numbers between sixty and eighty runners per race. The event usually starts and ends in the main stadium, with the rest of the race taking place on the surrounding roads of the host city.

The championship records for the event are 2:06:54 hours for men, set by Abel Kirui in 2009, and 2:20:57 hours for women, set by Paula Radcliffe in 2005. The world record has never been broken or equalled at the competition by either men or women, reflecting the lack of pacemaking and athletes' more tactical approach to championship races.

Catherine Ndereba and Edna Kiplagat are the most successful athletes of the event, having each won two gold medals and one silver medal in the women's marathon. In addition, Kiplagat finished top five in five consecutive World Athletics Championship Marathons from 2011-2019. Three other athletes have won the World Championships marathon twice: Abel Antón, Jaouad Gharib, and Abel Kirui – all of whom along with Edna Kiplagat had back-to-back victories.

Kenya is the most successful nation in the discipline, having won ten gold medals overall (five in each division). Ethiopia is the next most successful, with six gold medallists. Spain has won three gold medals.