| San Mateo County Office of Education, CA (District) |
| San Mateo ESA, CA (ISD) |
| San Mateo Union High, CA (District) |
| San Mateo-Foster City, CA (District) |
| San Miguel County, CO (ISD) |
| San Miguel County, NM (ISD) |
| San Miguel Joint Union, CA (District) |
| San Pasqual Union Elementary, CA (District) |
| San Pasqual Valley Unified, CA (District) |
| San Patricio County, TX (ISD) |
| San Perlita ISD, TX (District) |
| San Rafael City Elementary, CA (District) |
| San Rafael City High, CA (District) |
| San Ramon Valley Unified, CA (District) |
| San Saba County, TX (ISD) |
