The 2013 Chicago Marathon was the 36th edition of the Chicago Marathon, held each year in Chicago, Illinois, and took place on Sunday, October 13. The elite races were won by Kenyan athletes Dennis Kipruto Kimetto (2:03:45) and Rita Jeptoo (2:19:57).
It had 39,122 finishers, (21,618 male, 17,504 female), and an average finishing time of 4:32:23.