Northern Iowa vs Southern Illinois Series
Northern Iowa leads the series with Southern Illinois 10–9 across 19 meetings.
| MEETINGS | 19 |
| SERIES | Northern Iowa leads 10–9 |
| NORTHERN IOWA WINS | 10 |
| SOUTHERN ILLINOIS WINS | 9 |
| STREAK | Southern Illinois won the last meeting |
| LAST MEETING | Southern Illinois 31, Northern Iowa 17 · 2025 |
| FIRST ON RECORD | Northern Iowa 43, Southern Illinois 40 · 2003 |
