| SQ | 4A IESA 7th Grade | 52.54 | 
| Lane | Team | Squad | Seed | Note | 
|---|---|---|---|---|
| 1 | Harvard | A | 1:01.60 | |
| 2 | Belvidere South | A | 59.04 | |
| 3 | Challand | A | 56.28 | |
| 4 | Eisenhower | A | 58.28 | |
| 5 | West | A | 1:00.62 | 
| Lane | Team | Squad | Seed | Note | 
|---|---|---|---|---|
| 1 | Freeport | A | 54.18 | |
| 2 | Reagan | A | 52.98 | |
| 3 | Flinn | A | 51.82 | |
| 4 | Harlem | A | 51.95 | |
| 5 | Roscoe | A | 53.41 | |
| 6 | Belvidere Central | A | 55.80 |