Kenyan Brigid Kosgei sets a new world record for a woman runner with a time of 2:14:04 at the 2019 Chicago Marathon.

Brigid Jepchirchir Kosgei is a Kenyan long-distance runner who specialises in the marathon. She won the 2018 and 2019 Chicago Marathons, the 2019 and 2020 London Marathons and the 2021 Tokyo Marathon. Kosgei was the marathon world record holder for women running in a mixed-sex race, with a time of 2:14:04 achieved on 13 October 2019 at the Chicago Marathon. She won the silver medal in the marathon event at the 2020 Tokyo Olympics.

The 2019 Chicago Marathon was the 42nd annual running of the Chicago Marathon held in Chicago, Illinois, United States on October 13, 2019. The men's race was won by Kenyan Lawrence Cherono in 2:05:45 while the women's was won by Kenyan Brigid Kosgei in 2:14:04, a world record by 81 seconds. The men's and women's wheelchair races were won by Daniel Romanchuk and Manuela Schär in 1:30:26 and 1:41:08, respectively. More than 45,000 runners completed the race.

October 13 is the 286th day of the year in the Gregorian calendar; 79 days remain until the end of the year.