| * | WSC Gold Soph | 1:16.64 | Morton West | 1963 | |
| # | WSC Gold Varsity | 1:14.28 | Hinsdale South | 2016 |
| Lane | Team | Squad | Seed | Note |
|---|---|---|---|---|
| 4 | Proviso East | A | NT | |
| 5 | Addison Trail | A | 1:22.45 | |
| 6 | Downers Grove So | A | NT |
| Lane | Team | Squad | Seed | Note |
|---|---|---|---|---|
| 3 | Leyden | A | 1:18.70 | |
| 4 | Morton | A | 1:16.00 | |
| 5 | Hinsdale South | A | 1:16.34 | |
| 6 | Willowbrook | A | 1:21.31 |