| Cashton School District, WI (District) |
| Casman Alternative Academy, MI (PSA) |
| Cass City Public Schools, MI (District) |
| Cass County, MO (ISD) |
| Cass County, TX (ISD) |
| Cass County, MN (ISD) |
| Cass County, IN (ISD) |
| Cass County, ND (ISD) |
| Cass County, NE (ISD) |
| Cass County, IA (ISD) |
| Cass County, IL (ISD) |
| Cass Lake-Bena Public Schools, MN (District) |
| Cass SD 63, IL (District) |
| Cass Township Schools, IN (District) |
| Cassadaga Valley Central School District, NY (District) |
