Tri-River Conference (IHSAA) Former members Former members

| School | Location_ | Mascot | County | Year_Joined | Year_Left | Conference_Joined |
|---|---|---|---|---|---|---|
| Clay City * | Clay City | Eels | 11 Clay | 1964 | 2010 | SW Indiana |
| Montezuma | Montezuma | Aztecs | 61 Parke | 1964 | 1986 | none (consolidated into Riverton Parke ) |
| Rosedale | Rosedale | Hotshots | 61 Parke | 1964 | 1986 | none (consolidated into Riverton Parke ) |
| Shakamak * | Jasonville | Lakers | 28 Greene | 1964 | 2010 | SW Indiana |
| Stauton | Staunton | Yellow Jackets | 11 Clay | 1964 | 1984 | none (consolidated into Northview ) |
| Terre Haute Schulte * | Terre Haute | Golden Bears | 84 Vigo | 1964 | 1971? | Western Indiana |
| Terre Haute State | Terre Haute | Little Sycamores | 84 Vigo | 1964 | 1978 | none (school closed) |