| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | Dominick BURROUGHS | 8 | Lewis & Clark Jr. High | NT | |
| 2 | Miles BRUECKNER | 8 | Bethalto Trimpe | 1:10.00 | |
| 3 | Aden BRUNAUGH | 8 | Illini-Jerseyville | 1:03.87 | |
| 4 | J KWINTEN | 8 | Liberty Middle School | 1:02.00 | |
| 5 | Aiden JOHNSON | 8 | Liberty Middle School | 1:03.00 | |
| 6 | Cohen DUGAN | 8 | Roxana MS | 1:06.60 | |
| 7 | Dalton TWENTE | 8 | Bethalto Trimpe | 1:15.00 | |
| 8 | Sean LINDSAY | 8 | Lincoln Middle School | NT |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | Rashad MURRELL | 8 | Alton Middle School | 1:00.20 | |
| 2 | Titus DOUGHER | 8 | East Alton | 59.16 | |
| 3 | Isaiah ELLIOTT/BARNES | 8 | Alton Middle School | 56.50 | |
| 4 | Kaden WILSON | 8 | Lincoln Middle School | 54.59 | |
| 5 | Ethan SHAW | 8 | Coolidge Junior High | 55.94 | |
| 6 | Ronan WINTERS | 8 | Lewis & Clark Jr. High | 59.10 | |
| 7 | Jack DEIST | 8 | Illini-Jerseyville | 59.68 | |
| 8 | Joel FARAONE | 8 | Coolidge Junior High | 1:00.37 |