| Coos County, NH (ISD) |
| Coos County, NH (District) |
| Coos County, OR (ISD) |
| Coos County School District, NH (District) |
| Coosa County, AL (District) |
| Coosa County, AL (ISD) |
| Cooter R-Iv, MO (District) |
| Copan, OK (District) |
| Copeland, KS (District) |
| Copenhagen Central School District, NY (District) |
| Copiague Union Free School District, NY (District) |
| Copiah Co School Dist, MS (District) |
| Copiah County, MS (ISD) |
| Copley-Fairlawn City School District, OH (District) |
| Coplin Plt School Department, ME (District) |
