2018 Illinois Fighting Illini Opponent Penalty Split Stats through 01/07/2019
| Split | G | Pen. | Yards | Pen./G | Yards/G |
|---|---|---|---|---|---|
| All Games | 12 | 71 | 692 | 5.9 | 57.7 |
| at Home | 6 | 27 | 242 | 4.5 | 40.3 |
| on Road/Neutral Site | 6 | 44 | 450 | 7.3 | 75.0 |
| in Wins | 4 | 23 | 215 | 5.8 | 53.8 |
| in Losses | 8 | 48 | 477 | 6.0 | 59.6 |
| vs. Conference | 9 | 46 | 474 | 5.1 | 52.7 |
| vs. Non-Conference | 3 | 25 | 218 | 8.3 | 72.7 |
| vs. Ranked (AP) | 3 | 10 | 102 | 3.3 | 34.0 |
| vs. Unranked (AP) | 9 | 61 | 590 | 6.8 | 65.6 |
| vs. FBS (I-A) | 11 | 65 | 635 | 5.9 | 57.7 |
| vs. FCS (I-AA) | 1 | 6 | 57 | 6.0 | 57.0 |
| vs. FBS Winning | 6 | 31 | 290 | 5.2 | 48.3 |
| vs. FBS Non-Winning | 5 | 34 | 345 | 6.8 | 69.0 |
| vs. FBS Power 5 | 9 | 46 | 474 | 5.1 | 52.7 |
| vs. FBS non-Power 5 | 2 | 19 | 161 | 9.5 | 80.5 |
| in August/September | 4 | 33 | 290 | 8.3 | 72.5 |
| in October | 4 | 27 | 285 | 6.8 | 71.3 |
| in November | 4 | 11 | 117 | 2.8 | 29.3 |
| in December/January | 0 | 0 | 0 | - | - |