| Competition: | 32nd Chicago Marathon |
| Venue: | Chicago, United States |
| Dates: | October 11 |
| Men: | Samuel Wanjiru |
| Men Win Value: | 2:05:41 |
| Women: | Irina Mikitenko |
| Women Win Value: | 2:26:31 |
| Prev: | 2008 |
| Next: | 2010 |
The 2009 Chicago Marathon was the 32nd running of the annual marathon race in Chicago, United States and was held on October 11. The elite men's race was won by Kenya's Samuel Wanjiru in a time of 2:05:41 hours and the women's race was won by Germany's Irina Mikitenko in 2:26:31. The competition was originally won by Russia's Liliya Shobukhova in a time of 2:25:56, but she was retrospectively disqualified due to doping violations.
| Position | Athlete | Nationality | Time | |
|---|---|---|---|---|
| 1 | Samuel Wanjiru | 2:05:41 | ||
| 2 | Abderrahim Goumri | 2:06:04 | ||
| 3 | Vincent Kipruto | 2:06:08 | ||
| 4 | Charles Munyeki Kiama | 2:07:06 | ||
| 5 | Richard Limo | 2:08:43 | ||
| 6 | Wesley Korir | 2:10:38 | ||
| 7 | Isaac Macharia Wanjohi | 2:11:09 | ||
| 8 | Sergio Reyes | 2:15:30 | ||
| 9 | Tadese Tola | 2:15:48 | ||
| 10 | Patrick Rizzo | 2:15:48 |
| Position | Athlete | Nationality | Time | |
|---|---|---|---|---|
| 1 | Irina Mikitenko | 2:26:31 | ||
| 2 | Lidiya Grigoryeva | 2:26:47 | ||
| 3 | Teyba Erkesso | 2:26:56 | ||
| 4 | Berhane Adere | 2:28:38 | ||
| 5 | Deena Kastor | 2:28:50 | ||
| 6 | Mizuho Nasukawa | 2:29:22 | ||
| 7 | Melissa White | 2:32:55 | ||
| 8 | Tera Moody | 2:32:59 | ||
| 9 | Adriana Pirtea | 2:34:07 | ||
| 10 | Elfenesh Alemu | 2:35:36 | ||
| Liliya Shobukhova | 2:25:56 |