| CLAYTON PUBLIC SCHOOLS, NJ (District) |
| Clayton Ridge Comm School District, IA (District) |
| Clayton School District, WI (District) |
| Cle Elum-Roslyn School District, WA (District) |
| Clear Creek Amana Comm School District, IA (District) |
| Clear Creek County, CO (ISD) |
| Clear Creek Elementary, CA (District) |
| Clear Creek ISD, TX (District) |
| Clear Creek Re-1, CO (District) |
| Clear Fork Valley Local School District, OH (District) |
| Clear Lake Comm School District, IA (District) |
| Clear Lake School District, WI (District) |
| Clearbrook-Gonvick School District, MN (District) |
| Clearfield Area SD, PA (District) |
| Clearfield Comm School District, IA (District) |
