| Carlstadt-East Rutherford Regional High School, NJ (District) |
| Carlton County, MN (ISD) |
| Carlton Public School District, MN (District) |
| Carlyle CUSD 1, IL (District) |
| Carlynton SD, PA (District) |
| Carman-Ainsworth Community Schools, MI (District) |
| Carmel Central School District, NY (District) |
| Carmel Clay Schools, IN (District) |
| Carmel Unified, CA (District) |
| Carmen High School of Science and, WI (PSA) |
| Carmen Middle School South, WI (PSA) |
| Carmi-White County CUSD 5, IL (District) |
| Carmichaels Area SD, PA (District) |
| Carnegie, OK (District) |
| Carney, OK (District) |
