| 9/2/2023 | Toledo (11-3) | 28 | at | Illinois | 30 | MAC | ||
| 9/8/2023 | Illinois | 23 | at | Kansas (9-4) | 34 | at B12 | ||
| 9/16/2023 | Penn State (10-3,7-2) | 30 | at | Illinois | 13 | |||
| 9/23/2023 | Florida Atlantic (4-8) | 17 | at | Illinois | 23 | AAC | ||
| 9/30/2023 | Illinois | 19 | at | Purdue (4-8,3-6) | 44 | |||
| 10/6/2023 | Nebraska (5-7,3-6) | 20 | at | Illinois | 7 | |||
| 10/14/2023 | Illinois | 27 | at | Maryland (8-5,4-5) | 24 | |||
| 10/21/2023 | Wisconsin (7-6,5-4) | 25 | at | Illinois | 21 | |||
| 11/4/2023 | Illinois | 27 | at | Minnesota (6-7,3-6) | 26 | |||
| 11/11/2023 | Indiana (3-9,1-8) | 45 | at | Illinois | 48 | OT | ||
| 11/18/2023 | Illinois | 13 | at | Iowa (10-4,7-3) | 15 | |||
| 11/25/2023 | Northwestern (8-5,5-4) | 45 | at | Illinois | 43 |
| vs Illinois | vs Other Opponents | Illinois compared to OOs | |
| Record: | 7-5 | 78-64 | |
| Points Scored: | 29.42 | 24.94 | -4.48 |
| Points Allowed: | 24.50 | 22.25 | 2.25 |
| Margin: | 4.92 | 2.69 | -2.23 |
| Total Points: | 53.92 | 47.19 | 6.73 |