| Chula Vista Elementary, CA (District) |
| Church School District, MI (District) |
| Churchill County, NV (ISD) |
| Churchill County School District, NV (District) |
| Churchville-chili Central School District, NY (District) |
| Cibola County, NM (ISD) |
| Cicero SD 99, IL (District) |
| Cien Aguas International School, NM (PSA) |
| Cienega Union Elementary, CA (District) |
| Cimarron, OK (District) |
| Cimarron County, OK (ISD) |
| Cimarron Municipal Schools, NM (District) |
| Cimarron-Ensign, KS (District) |
| Cincinnati Achievement Academy, OH (PSA) |
| Cincinnati City CTPD, OH (District) |
