| Claremore, OK (District) |
| Clarence Central School District, NY (District) |
| Clarenceville School District, MI (District) |
| Clarendon 01, SC (District) |
| Clarendon 02, SC (District) |
| Clarendon 03, SC (District) |
| Clarendon 80, SC (District) |
| Clarendon County, SC (ISD) |
| Clarendon ISD, TX (District) |
| Clarendon School District, AR (District) |
| Clarinda Comm School District, IA (District) |
| Clarion Area SD, PA (District) |
| Clarion County, PA (ISD) |
| Clarion County Career Center, PA (District) |
| Clarion Limestone Area SD, PA (District) |
