| Sulphur Bluff ISD, TX (District) |
| Sulphur Springs ISD, TX (District) |
| Sulphur Springs Union, CA (District) |
| Sultan School District, WA (District) |
| Summerfield Schools, MI (District) |
| Summers County, WV (ISD) |
| Summers County Schools, WV (District) |
| Summersville R-Ii, MO (District) |
| Summersville SD 79, IL (District) |
| Summerville Elementary, CA (District) |
| Summerville Union High, CA (District) |
| Summit Academy, UT (PSA) |
| Summit Academy - Toledo, OH (PSA) |
| Summit Academy Akron Elementary School, OH (PSA) |
| Summit Academy Akron Middle School, OH (PSA) |
