| 31st Chicago Marathon | |
|---|---|
 Men's winner Cheruiyot at the race | |
| Venue | Chicago, United States |
| Dates | October 12 |
| Champions | |
| Men | Evans Cheruiyot (2:06:25) |
| Women | Lidiya Grigoryeva (2:27:17) |
The 2008 Chicago Marathon was the 31st running of the annual marathon race in Chicago, United States and was held on October 12. The elite men's race was won by Kenya's Evans Cheruiyot in a time of 2:06:25 hours and the women's race was won by Russia's Lidiya Grigoryeva in 2:27:17.