| St. Clair County Intervention Academy, MI (PSA) |
| St. Clair County Learning Academy, MI (PSA) |
| St. Clair County RESA, MI (ISD) |
| St. Clair Public School District, MN (District) |
| St. Clair R-Xiii, MO (District) |
| St. Clairsville-Richland City School District, OH (District) |
| St. Cloud Public School District, MN (District) |
| St. Cloud Social Justice Academy, MN (PSA) |
| St. Croix Preparatory Academy, MN (District) |
| St. Croix River Education District, MN (District) |
| St. Elizabeth R-Iv, MO (District) |
| St. Francis Public School District, MN (District) |
| St. Francois County, MO (ISD) |
| St. George Academy, UT (PSA) |
| St. Helena Parish, LA (ISD) |
