| Caroline County Public Schools, MD (District) |
| Carondelet Leadership Academy, MO (District) |
| Carpe Diem - Meridian Campus, IN (District) |
| Carpe Diem - Northwest, IN (District) |
| Carpe Diem - Shadeland, IN (District) |
| Carpe Diem Collegiate High School, AZ (District) |
| Carpe Diem Schools, TX (PSA) |
| Carpinteria Unified, CA (District) |
| Carrabassett Valley School Department, ME (District) |
| Carrier Mills-Stonefort CUSD 2, IL (District) |
| Carrington 49, ND (District) |
| Carrizo Springs Cisd, TX (District) |
| Carrizozo Municipal Schools, NM (District) |
| Carroll, VA (District) |
| Carroll Comm School District, IA (District) |
