| Concord School District, AR (District) |
| Concord-Carlisle, MA (District) |
| Concordia, KS (District) |
| Concordia Charter School Inc., AZ (PSA) |
| Concordia Creative Learning Academy, MN (District) |
| Concordia Parish, LA (District) |
| Concordia Parish, LA (ISD) |
| Concordia R-Ii, MO (District) |
| Concrete School District, WA (District) |
| Conde School District, SD (District) |
| Condon Sd 25J, OR (District) |
| Conecuh County, AL (ISD) |
| Conecuh County, AL (District) |
| Conejo Valley Unified, CA (District) |
| Conejos County, CO (ISD) |
