2021 Northern Illinois Huskies Opponent Penalty Split Stats through 01/10/2022
| Split | G | Pen. | Yards | Pen./G | Yards/G |
|---|---|---|---|---|---|
| All Games | 14 | 77 | 651 | 5.5 | 46.5 |
| at Home | 6 | 32 | 266 | 5.3 | 44.3 |
| on Road/Neutral Site | 8 | 45 | 385 | 5.6 | 48.1 |
| in Wins | 9 | 48 | 432 | 5.3 | 48.0 |
| in Losses | 5 | 29 | 219 | 5.8 | 43.8 |
| vs. Conference | 9 | 54 | 442 | 6.0 | 49.1 |
| vs. Non-Conference | 5 | 23 | 209 | 4.6 | 41.8 |
| vs. Ranked (AP) | 1 | 5 | 45 | 5.0 | 45.0 |
| vs. Unranked (AP) | 13 | 72 | 606 | 5.5 | 46.6 |
| vs. FBS (I-A) | 13 | 72 | 586 | 5.5 | 45.1 |
| vs. FCS (I-AA) | 1 | 5 | 65 | 5.0 | 65.0 |
| vs. FBS Winning | 7 | 42 | 350 | 6.0 | 50.0 |
| vs. FBS Non-Winning | 6 | 30 | 236 | 5.0 | 39.3 |
| vs. FBS Power 5 | 2 | 7 | 50 | 3.5 | 25.0 |
| vs. FBS non-Power 5 | 11 | 65 | 536 | 5.9 | 48.7 |
| in August/September | 4 | 16 | 145 | 4.0 | 36.3 |
| in October | 4 | 28 | 236 | 7.0 | 59.0 |
| in November | 4 | 19 | 133 | 4.8 | 33.3 |
| in December/January | 2 | 14 | 137 | 7.0 | 68.5 |