| Corner Canyon High School | - | Varsity | Medium | 0 | | |
| Cornerstone Christian School | - | Varsity | Medium | 0 | | |
| Corona Del Sol High School | - | Junior | - | 0 | | |
| Corona Del Sol High School | - | Varsity | Medium | 0 | | |
| Corona Del Sol High School | - | Varsity | Small | 0 | | |
| Corona Del Sol High School | - | Varsity | Medium | 0 | | |
| Coronado High School | - | Varsity | Medium | 0 | | |
| Coronado High School | - | Junior | - | 0 | | |
| Coronado High School | - | Varsity | Medium | 0 | | |
| Costa Mesa High School | - | Varsity | Small | 0 | | |
| Cottonwood High School | - | Varsity | Medium | 0 | | |
| Cottonwood High School | - | Varsity | Medium | 0 | | |
| Crean Lutheran High School | - | Varsity | Medium | 0 | | |
| Crean Lutheran High School | - | Varsity | Medium | 0 | | |
| Creek Wood High School | - | Varsity | Large | 0 | | |
| Creekside High School | - | Varsity | Medium | 0 | | |
| Creekside High School | - | Varsity | - | 0 | | |
| Crestview High School | - | Varsity | Medium | 0 | | |
| Crestwood High School | - | Varsity | Small | 0 | | |
| Crismon High School | - | Varsity | - | 0 | | |
| Cullman High School | - | Varsity | Medium | 0 | | |
| Cumberland County High School | - | Varsity | Medium | 0 | | |
| Cumberland Gap High School | - | Varsity | Medium | 0 | | |
| Currituck County High School | - | Varsity | Large | 0 | | |
| Currituck County High School | - | Varsity | Medium | 0 | | |