| South Heart 9, ND (District) |
| South Henry School Corp, IN (District) |
| South Holland SD 150, IL (District) |
| South Holland SD 151, IL (District) |
| South Holt Co. R-I, MO (District) |
| South Hunterdon Regional, NJ (District) |
| South Huntington Union Free School District, NY (District) |
| South Iron Co. R-I, MO (District) |
| South Jefferson Central School District, NY (District) |
| South Kingstown, RI (District) |
| South Kitsap School District, WA (District) |
| South Knox School Corp, IN (District) |
| South Koochiching School District, MN (District) |
| South Kortright Central School District, NY (District) |
| South Lake Schools, MI (District) |
