| Cooper School Department, ME (District) |
| Cooperative Educational Services, CT (District) |
| Cooperstown Central School District, NY (District) |
| Coopersville Area Public School District, MI (District) |
| Coos Bay Sd 9, OR (District) |
| Coos County, NH (ISD) |
| Coos County, NH (District) |
| Coos County, OR (ISD) |
| Coos County School District, NH (District) |
| Coosa County, AL (ISD) |
| Coosa County, AL (District) |
| Cooter R-Iv, MO (District) |
| Copan, OK (District) |
| Copeland, KS (District) |
| Copenhagen Central School District, NY (District) |
