| Connetquot Central School District, NY (District) |
| Conotton Valley Union Local School District, OH (District) |
| Conrad Elem, MT (District) |
| Conrad H S, MT (District) |
| Conrad Weiser Area SD, PA (District) |
| Conroe ISD, TX (District) |
| Cons HSD 230, IL (District) |
| Conservatory Lab Charter (District), MA (District) |
| Constantine Public School District, MI (District) |
| Constellation Schools: Eastside Arts Academy, OH (PSA) |
| Constellation Schools: Elyria Community, OH (PSA) |
| Constellation Schools: Lorain Community Elementary, OH (PSA) |
| Constellation Schools: Lorain Community Middle, OH (PSA) |
| Constellation Schools: Madison Community Elementary, OH (PSA) |
| Constellation Schools: Old Brooklyn Community Elementary, OH (PSA) |
