| Chino Hills High School | - | Varsity | Small | 0 | | |
| Chisholm Trail High School | - | Varsity | Medium | 0 | | |
| Christian Academy of Knoxville | - | Varsity | Medium | 0 | | |
| Churchill High School | - | Varsity | Medium | 0 | | |
| Citronelle High School | - | Varsity | - | 0 | | |
| Citrus Valley High School | - | - | - | 0 | | |
| City of Doral | L3 | - | Medium | 0 | | |
| City of Doral | L4.2 | - | - | 0 | | |
| Clarke High School | - | Varsity | Medium | 0 | | |
| Clarksville Elite Cheer Center | L2 | Junior | Medium | 0 | | |
| Clay High School | - | Varsity | Medium | 0 | | |
| Clay High School | - | Varsity | Medium | 0 | | |
| Clay High School | - | Varsity | Small | 0 | | |
| Clear Creek High School | - | Varsity | Medium | 0 | | |
| Clear Falls High School | - | Varsity | Medium | 0 | | |
| Clear Lake High School | - | Varsity | Large | 0 | | |
| Clear Lake High School | - | Varsity | Small | 0 | | |
| Clear Lake High School | L3 | - | - | 0 | | |
| Clements High School | - | Varsity | Large | 0 | | |
| Clinton High School | - | Varsity | Medium | 0 | | |
| Clinton High School | - | Varsity | Medium | 0 | | |
| Clovis East High School | - | Varsity | Small | 0 | | |
| Clovis North High School | - | Varsity | Small | 0 | | |
| Clovis North High School | - | Varsity | Medium | 0 | | |
| Clovis United All Stars | L1 | Mini | - | 0 | | |
| Clovis West High School | - | Varsity | Medium | 0 | | |
| Coalinga High School | - | - | Medium | 0 | | |
| Coastal All-Stars | L2 | Junior | - | 0 | | |
| Coastal All-Stars | L1.1 | Junior | - | 0 | | |
| Coastal Georgia Athletics | L3 | Junior | Small | 0 | | |
| Coastal Georgia Athletics | L2 | Junior | Small | 0 | | |
| Colleyville Heritage High School | - | Varsity | Medium | 0 | | |
| Colleyville High School | - | Varsity | Medium | 0 | | |
| Collierville High School | - | Junior | - | 0 | | |
| Columbia Academy | - | Varsity | Medium | 0 | | |
| Columbia Central High School | - | Varsity | Medium | 0 | | |
| Columbine High School | - | Varsity | Large | 0 | | |
| Columbine High School | - | Varsity | Small | 0 | | |
| Columbine High School | - | Varsity | Medium | 0 | | |
| Columbine High School | - | - | Medium | 0 | | |
| Columbine High School | - | Varsity | Medium | 0 | | |
| Columbine High School | - | Varsity | Medium | 0 | | |
| Columbine High School | - | Junior | Small | 0 | | |
| Columbus High School | - | Varsity | Medium | 0 | | |
| Columbus High School | - | Varsity | Medium | 0 | | |
| Columbus High School | - | Varsity | Medium | 0 | | |
| Columbus Power Elite | - | Youth | Medium | 0 | | |
| Commack High School | - | Varsity | Medium | 0 | | |
| Commack High School | - | Varsity | Medium | 0 | | |
| Commack High School | - | Varsity | Medium | 0 | | |