| Columbia Union, CA (District) |
| Columbia-Brazoria ISD, TX (District) |
| Columbia-Montour Avts, PA (District) |
| Columbiana County Career and Technology Center, OH (District) |
| Columbiana County Educational Service Center, OH (ISD) |
| Columbiana County JVSD CTPD, OH (District) |
| Columbiana Exempted Village School District, OH (District) |
| Columbine Elementary, CA (District) |
| Columbus, KS (District) |
| Columbus Arts & Technology Academy, OH (PSA) |
| Columbus Bilingual Academy-North, OH (PSA) |
| Columbus Charter School, NC (District) |
| Columbus City CTPD, OH (District) |
| Columbus City School District, OH (District) |
| Columbus Collegiate Academy, OH (PSA) |
