| Connersville High School | - | Varsity | Small | 0 | | |
| Connetquot High School | - | Varsity | Medium | 0 | | |
| Connetquot High School | - | Varsity | Large | 0 | | |
| Connetquot High School | - | Varsity | Medium | 0 | | |
| Connetquot High School | - | Varsity | Small | 0 | | |
| Conrad Weiser High School | - | Varsity | - | 0 | | |
| Conrad Weiser High School | - | Varsity | - | 0 | | |
| Conroe High School | - | Varsity | - | 0 | | |
| Conroe High School | - | Varsity | - | 0 | | |
| Converse High School | - | Varsity | - | 0 | | |
| Cookeville High School | - | Varsity | - | 0 | | |
| Cookeville High School | - | Varsity | Large | 0 | | |
| Cookeville High School | - | Varsity | Medium | 0 | | |
| Cookeville High School | - | Varsity | Small | 0 | | |
| Cookeville High School | - | Varsity | - | 0 | | |
| Cookeville High School | - | Varsity | - | 0 | | |
| Coon Rapids High School | - | Varsity | - | 0 | | |
| Cooper High School | - | Varsity | - | 0 | | |
| Cooper High School | - | Varsity | - | 0 | | |
| Cooper High School | - | Varsity | Medium | 0 | | |
| Cooper High School | - | Varsity | Large | 0 | | |
| Cooper High School | - | Varsity | Medium | 0 | | |
| Coppell High School | - | Varsity | Large | 0 | | |
| Copper Hills High School | - | Junior | - | 0 | | |
| Copper Hills High School | - | Varsity | Medium | 0 | | |
| Coral Reef High School | - | Varsity | - | 0 | | |
| Coral Springs Charter School* | - | Varsity | Small | 0 | | |
| Coral Springs High School | - | Varsity | Small | 0 | | |
| Coral Springs High School | - | Varsity | Small | 0 | | |
| Corbin High School | - | Varsity | Small | 0 | | |
| Corbin High School | - | Varsity | Medium | 0 | | |
| Cordova High School | - | Varsity | Small | 0 | | |
| Cordova High School | - | Varsity | - | 0 | | |
| Cordova High School | - | Varsity | Large | 0 | | |
| Cordova High School | - | Varsity | Small | 0 | | |
| Corinth High School | - | Varsity | Large | 0 | | |
| Corinth Holders High School | - | Varsity | Small | 0 | | |
| Corinth Holders High School | - | Varsity | Small | 0 | | |
| Corner Canyon High School | - | Varsity | Small | 0 | | |
| Corner Canyon High School | - | Varsity | Medium | 0 | | |
| Corner Canyon High School | - | Varsity | Large | 0 | | |
| Corner Canyon High School | - | Varsity | Large | 0 | | |
| Corner Canyon High School | - | Varsity | Medium | 0 | | |
| Cornerstone Charter Academy | - | Varsity | Small | 0 | | |
| Cornerstone Christian School | - | - | - | 0 | | |
| Cornerstone Christian School | - | Varsity | Medium | 0 | | |
| Cornerstone Christian School | - | Varsity | Small | 0 | | |
| Corona Del Sol High School | - | Varsity | Medium | 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 | | |
| Corona Del Sol High School | - | Varsity | - | 0 | | |
| Coronado High School | - | Varsity | - | 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 | | |
| Cottage Hill Christian Academy | - | Varsity | - | 0 | | |
| Cottonwood High School | - | Varsity | Medium | 0 | | |
| Cottonwood High School | - | Varsity | Medium | 0 | | |
| Covington High School | - | Varsity | - | 0 | | |
| Covington High School | - | Varsity | Large | 0 | | |
| Cox Mill High School | - | Varsity | - | 0 | | |
| Cox Mill High School | - | Varsity | Small | 0 | | |
| Crandall High School | - | Varsity | Large | 0 | | |
| Crandall High School | - | Varsity | - | 0 | | |
| Crean Lutheran High School | - | Varsity | Small | 0 | | |
| Crean Lutheran High School | - | Varsity | Medium | 0 | | |
| Crean Lutheran High School | - | Varsity | - | 0 | | |
| Crean Lutheran High School | - | Varsity | Medium | 0 | | |
| Crean Lutheran High School | - | Varsity | Small | 0 | | |
| Crean Lutheran High School | - | Varsity | Small | 0 | | |
| Creek Wood High School | - | Varsity | Large | 0 | | |
| Creek Wood High School | - | Varsity | Small | 0 | | |
| Creek Wood High School | - | Varsity | Large | 0 | | |
| Creek Wood High School | - | Varsity | Small | 0 | | |
| Creekside High School | - | Varsity | Medium | 0 | | |
| Creekside High School | - | Varsity | - | 0 | | |
| Crescenta Valley High School | - | Varsity | - | 0 | | |
| Crescenta Valley High School | - | Varsity | - | 0 | | |
| Crestview High School | - | Varsity | Small | 0 | | |
| Crestview High School | - | Varsity | Large | 0 | | |
| Crestview High School | - | Varsity | Medium | 0 | | |
| Crestview High School | - | Varsity | Small | 0 | | |
| Crestwood High School | - | Varsity | Small | 0 | | |
| Crestwood High School | - | Varsity | Small | 0 | | |
| Crestwood High School | - | Varsity | Small | 0 | | |
| Crestwood High School | - | Varsity | Small | 0 | | |
| Crestwood High School | - | Varsity | - | 0 | | |
| Crete High School | - | Varsity | Small | 0 | | |
| Crimson Cliffs High School | - | Varsity | Small | 0 | | |
| Crimson Cliffs High School | - | Varsity | Small | 0 | | |
| Crimson Cliffs High School | - | Varsity | Large | 0 | | |
| Crimson Cliffs High School | - | Varsity | Small | 0 | | |
| Crismon High School | - | Varsity | - | 0 | | |
| Cristo Rey Dallas College Prep | - | Varsity | - | 0 | | |
| Crockett County High School | - | Varsity | - | 0 | | |
| Crockett County High School | - | Varsity | - | 0 | | |
| Cross Roads High School | - | Varsity | Small | 0 | | |
| Crossings Christian School | - | Varsity | Small | 0 | | |