| Q | IHSA 3A Qualifying Standard | 3:24.66 | 
| Lane | Team | Squad | Athlete 1 | Athlete 2 | Athlete 3 | Athlete 4 | Seed | 
|---|---|---|---|---|---|---|---|
| 1 | Oak Forest | A | Lawal, Bashir | Maher, Zach | O'Farrell, Mike | Odulate, Malik | 3:50.00 | 
| 2 | Frankfort (Lincoln-Way Ea | A | Smith, Bryson | Drafke, Ryan | Hudson, Brandon | Mathis, Joe | 3:38.56 | 
| 3 | Joliet (Central) | A | Baltz, Ben | Barefield, Ruddie | Garcia, Johnathan | Dworak, Jason | 3:35.32 | 
| 4 | Tinley Park (Andrew) | A | Ballard, Jack | Benes, Payton | Meskill, John | Solomon, Joe | 3:33.24 | 
| 5 | Harvey (Thornton) | A | Davis, Johnathon | Richardson, Silas | Randle El, Dion | Terrell, Nathan | 3:35.26 | 
| 6 | Bradley (B.-Bourbonnais) | A | Herrera, Mario | Piacenti, Ethan | Regnier, Dylan | Lamatsch, Jordan | 3:38.04 | 
| 7 | New Lenox (Lincoln-Way We | A | Auchstetter, Jack | Stiglic, Jonathan | Martorano, Michael | Stellwagen, Eli | 3:39.21 | 
| 8 | Midlothian (Bremen) | A | Handing, Jake | Guerrero, Kevin | Serrato, Miguel | Oliva, Erick | 4:05.24 | 
| Lane | Team | Squad | Athlete 1 | Athlete 2 | Athlete 3 | Athlete 4 | Seed | 
|---|---|---|---|---|---|---|---|
| 1 | Joliet (West) | A | Harris, Jabari | Jahn`, Felix | Cooksey, Ethan | Suero, Anthony | 3:31.01 | 
| 2 | Minooka | A | Armstrong, Malik | Colwell, Tyler | Fals, Tyler | Freese, Jordan | 3:27.04 | 
| 3 | Flossmoor (Homewood-F.) | A | Lenoir, Caleb | Clemon, Davell | Hunter, Jalen | Robinson, Jalen | 3:23.50 | 
| 4 | Chicago Heights (Bloom Tw | A | Bowens, Jalen | Clark, JaSean | Dickerson, Brian | Jones, Treziel | 3:22.46 | 
| 5 | Crete (C.-Monee) | A | Assil, Sammy | Safo, Jamal | Humphrey, Elantae | Johnson, Ricky | 3:23.10 | 
| 6 | South Holland (Thornwood) | A | Ruffin, Demir | Magee, Malik | Wordlow, Marlon | Somerville, Michael | 3:25.94 | 
| 7 | Lansing (Thornton Fractio | A | Keith, Wesley | Massy, James | Wilson, Chawn | Pippen, Jonah | 3:29.62 | 
| 8 | New Lenox (Lincoln-Way Ce | A | Wirth, Alex | Zabinski, Kyle | Englert, Andrew | Draper, Jake | 3:32.67 |