1986 Chicago Marathon

The 1986 Chicago Marathon was the tenth running of the annual marathon race in Chicago, United States, and was held on October 26. The elite men's race was won by Japan's Toshihiko Seko in a time of 2:08:27 hours, and the women's race was won by Norway's Ingrid Kristiansen in 2:27:08. A total of 8173 runners finished the race, an increase of over 600 from the previous year, and a number that would not be beaten until 1995.