| So. Conway Co. School District, AR (District) |
| So. Miss. County School Dist., AR (District) |
| Soap Lake School District, WA (District) |
| SOAR Academy Charter District, WA (District) |
| Soaring Heights, NJ (District) |
| Sobriety High, MN (District) |
| Social Circle City, GA (District) |
| Socorro Consolidated Schools, NM (District) |
| Socorro County, NM (ISD) |
| Socorro ISD, TX (District) |
| Socrates, MN (District) |
| Socrates Academy, NC (District) |
| Soda Springs Joint District, ID (District) |
| Sodus Central School District, NY (District) |
| Sodus Township S/D #5, MI (District) |
