| 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) |
| South Lane Sd 45J3, OR (District) |
| South Lemhi District, ID (District) |
| South Lewis Central School District, NY (District) |
| South Lyon Community Schools, MI (District) |
| South Macoupin Association, IL (District) |
| South Madison Com Sch Corp, IN (District) |
