Elite Performances
7 performances met the MileSplit US Second Team standard.
| HS Girls | Mark | Athlete | Team |
|---|---|---|---|
| 4x200 Meter Relay Finals | 1:46.35 | Relay Team | Hillside (Proviso West) |
| 4x200 Meter Relay Finals | 1:47.83 | Relay Team | Romeoville |
| 4x200 Meter Relay Finals | 1:47.94 | Relay Team | Chicago (Kenwood) |
| 4x200 Meter Relay Finals | 1:48.70 | Relay Team | DeKalb |
| 4x400 Meter Relay Finals | 4:07.45 | Relay Team | Hillside (Proviso West) |
| HS Boys | Mark | Athlete | Team |
| 4x200 Meter Relay Finals | 1:33.64 | Relay Team | LaGrange (Lyons) |
| 4x800 Meter Relay Finals | 8:15.98 | Relay Team | Chicago (Whitney Young) |