| Cold Spring Harbor High School | - | Varsity | Large | 0 | | |
| College View Middle School | - | Junior | Large | 0 | | |
| Colleyville Heritage High School | - | Varsity | Medium | 0 | | |
| Collierville Middle School | - | Junior | Large | 0 | | |
| Collierville Middle School | - | Junior | Large | 0 | | |
| Colonie Junior Wolf Pack | L1 | - | - | 0 | | |
| Columbia Academy | - | Open | - | 0 | | |
| Columbia Central High School | - | Varsity | Medium | 0 | | |
| Columbine High School | - | Varsity | Large | 0 | | |
| Columbine High School | - | Varsity | Small | 0 | | |
| Columbine High School | - | - | Large | 0 | | |
| Columbine High School | - | - | Large | 0 | | |
| Columbine High School | - | Varsity | Large | 0 | | |
| Columbine High School | - | - | Large | 0 | | |
| Columbine High School | - | Junior | Small | 0 | | |
| Columbus State University | - | - | Large | 0 | | |
| Concordia Lutheran High School | - | Varsity | Large | 0 | | |
| Conner High School | - | Varsity | Small | 0 | | |
| Conner High School | - | Varsity | Large | 0 | | |
| Connetquot High School | - | Varsity | Medium | 0 | | |
| Connetquot High School | - | Varsity | Large | 0 | | |
| Cookeville High School | - | Varsity | Large | 0 | | |
| Cooper High School | - | Junior | Large | 0 | | |
| Cooper High School | - | Varsity | - | 0 | | |
| Cooper High School | - | Varsity | Large | 0 | | |
| Coppell High School | - | Varsity | Large | 0 | | |
| Corbin Middle School | - | Junior | Large | 0 | | |
| Corbin Middle School | - | Junior | - | 0 | | |
| Cordova High School | - | Varsity | Large | 0 | | |
| Core Athletix | - | Open | Large | 0 | | |
| Core Athletix | L6 | Senior | Large | 0 | | |
| Core Athletix | L2 | Youth | Medium | 0 | | |
| Core Athletix Rochester | - | Senior | Large | 0 | | |
| Corinth High School | - | Varsity | Large | 0 | | |
| Corner Canyon High School | - | Varsity | Small | 0 | | |
| Corner Canyon High School | - | Varsity | Large | 0 | | |
| Corner Canyon High School | - | Varsity | Large | 0 | | |
| Corner Middle School | - | Junior | Large | 0 | | |
| Corona Del Sol High School | - | Junior | Large | 0 | | |
| Costa Rica All Stars | L5 | International Open | Large | 0 | | |
| Costa Rica CheerFusion | L5 | International Open | Large | 0 | | |
| Coulter Grove Intermediate School | - | Junior | Large | 0 | | |
| Coventry Dynamite | L5 | International Open | Large | 0 | | |
| Coventry Dynamite | L5 | International Open | Large | 0 | | |
| Coventry Dynamite | L4 | Open | Large | 0 | | |
| Coventry Dynamite Nitro | L5 | Open | Large | 0 | | |
| Covington High School | - | Varsity | Large | 0 | | |
| Cowley County Community College | - | - | Large | 0 | | |
| Cowley County Community College | - | - | Large | 0 | | |
| Coyotes | L4 | U18 | Large | 0 | | |