| Collingswood Public Schools, NJ (District) |
| Collingsworth County, TX (ISD) |
| Collins Career Center, OH (District) |
| Collins-Maxwell Comm School District, IA (District) |
| Collinsville, OK (District) |
| Collinsville Area Career Ctr, IL (District) |
| Collinsville CUSD 10, IL (District) |
| Collinsville ISD, TX (District) |
| Colman-Egan School District, SD (District) |
| Colmesneil ISD, TX (District) |
| Colo-NESCO Comm School District, IA (District) |
| Cologne Academy, MN (District) |
| Coloma Community Schools, MI (District) |
| Colome School District, SD (District) |
| Colon Community School District, MI (District) |
