| Summit Re-1, CO (District) |
| Summit School District, SD (District) |
| Summit SD 104, IL (District) |
| Summit Valley School District, WA (District) |
| Sumner Co Educational Services, KS (District) |
| Sumner County, KS (ISD) |
| Sumner County, TN (ISD) |
| Sumner County, TN (District) |
| Sumner School District, WA (District) |
| Sumner-Eddyville-Miller Schs, NE (District) |
| Sumner-Fredericksburg Comm School District, IA (District) |
| Sumter, FL (District) |
| Sumter 01, SC (District) |
| Sumter County, GA (ISD) |
| Sumter County, GA (District) |
