Indiana High School Athletics Conferences: Allen County – Metropolitan Greater South Shore Athletic Conference Greater South Shore Athletic Conference

| School | City | Mascot | Enrollment | County |
|---|---|---|---|---|
| Hammond Bishop Noll | Hammond | Warriors | 404 | 45 Lake |
| Gary Calumet | Gary | Warriors | 597 | 45 Lake |
| Lake Station Edison | Lake Station | Fighting Eagles | 423 | 45 Lake |
| Michigan City Marquette Catholic | Michigan City | Blazers | 195 | 46 LaPorte |
| North Newton | Morocco | Spartans | 466 | 56 Newton |
| River Forest | Hobart | Ingots | 470 | 45 Lake |
| South Central (Union Mills) | Union Mills | Satellites | 297 | 46 La Porte |
| Wheeler | Valparaiso | Bearcats | 545 | 64 Porter |
| Whiting | Whiting | Oilers | 381 | 45 Lake |