| Carter County, OK (ISD) |
| Carter County, MO (ISD) |
| Carter County, MT (ISD) |
| Carter County, TN (ISD) |
| Carter County H S, MT (District) |
| Carter County Schools, KY (District) |
| Carter Elem, MT (District) |
| Carteret County, NC (ISD) |
| Carteret County Public Schools, NC (District) |
| Carteret Public Schools, NJ (District) |
| Cartersville City, GA (District) |
| Carterville CUSD 5, IL (District) |
| Carthage Central School District, NY (District) |
| Carthage ESD 317, IL (District) |
| Carthage ISD, TX (District) |
