| Mode: | football |
| Year: | 2023 |
| Team: | Illinois Fighting Illini |
| Conference: | Big Ten Conference |
| Short Conf: | Big Ten |
| Record: | 5–7 |
| Conf Record: | 3–6 |
| Head Coach: | Bret Bielema |
| Hc Year: | 3rd |
| Off Coach: | Barry Lunney Jr. |
| Oc Year: | 2nd |
| Off Scheme: | Spread |
| Def Coach: | Aaron Henry |
| Dc Year: | 1st |
| Codef Coach1: | Terrance Jamison |
| Codc1 Year: | 1st |
| Def Scheme: | Multiple 3–4 |
| Stadium: | Memorial Stadium |
The 2023 Illinois Fighting Illini football team represented the University of Illinois in the West Division of the Big Ten Conference during the 2023 NCAA Division I FBS football season. The Fighting Illini were led by Bret Bielema in his third season as the team's head coach. They played their home games at Memorial Stadium in Champaign, Illinois.
The Illini were predicted to finish fourth in the Big Ten's West Division.[1]
| Big Ten media poll West Division | |||
| 1 | Wisconsin | 233 (20) | |
| 2 | Iowa | 232 (16) | |
| 3 | Minnesota | 176 (1) | |
| 4 | Illinois | 152 | |
| 5 | Nebraska | 116 | |
| 6 | Purdue | 89 | |
| 7 | Northwestern | 38 | |