| Casey County Schools, KY (District) |
| Casey-Westfield CUSD 4C, IL (District) |
| Cashion, OK (District) |
| Cashmere School District, WA (District) |
| Cashton School District, WI (District) |
| Casman Alternative Academy, MI (PSA) |
| Cass City Public Schools, MI (District) |
| Cass County, MN (ISD) |
| Cass County, IN (ISD) |
| Cass County, TX (ISD) |
| Cass County, IL (ISD) |
| Cass County, ND (ISD) |
| Cass County, NE (ISD) |
| Cass County, IA (ISD) |
| Cass County, MO (ISD) |
