| Sierra County, NM (ISD) |
| Sierra County Office of Education, CA (District) |
| Sierra ESA, CA (ISD) |
| Sierra Grande R-30, CO (District) |
| Sierra Leone Education Outreach Academy, MI (PSA) |
| Sierra Oaks School Inc, AZ (District) |
| Sierra Sands Unified, CA (District) |
| Sierra Unified, CA (District) |
| Sierra Vista Charter School Inc., AZ (PSA) |
| Sierra Vista Unified District, AZ (District) |
| Sierra-Plumas Joint Unified, CA (District) |
| Sigel Township S/D #3F, MI (District) |
| Sigel Township S/D #4F, MI (District) |
| Sigel Township S/D #6, MI (District) |
| Sigma Academy for Leadership and Early Middle College, MI (PSA) |
