| CINCINNATUS MIDDLE SCHOOL | 125 | regular | elementary |
| CINCO RANCH H S | 3,740 | regular | high |
| CINCO RANCH J H | 1,455 | regular | middle |
| CINEMA SCHOOL (THE) | 309 | regular | high |
| Cinnabar Charter | 156 | regular | elementary |
| Cinnaminson High School | 929 | regular | high |
| Cinnaminson Middle School | 671 | regular | middle |
| Cinnamon Elementary | 454 | regular | elementary |
| Cipriani Elementary | 471 | regular | elementary |
| Circle Benton Elementary | 286 | regular | other |
| Circle Center Grade School | 534 | regular | elementary |
| Circle Cross K8 STEM Academy | 728 | regular | elementary |
| Circle Greenwich Elementary | 337 | regular | other |
| Circle High | 604 | regular | high |
| Circle Middle School | 312 | regular | middle |
| Circle of Independent Learning | 394 | regular | other |
| Circle of Seasons CS | 433 | regular | elementary |
| Circle Oil Hill Elementary | 274 | regular | other |
| Circle Towanda Elementary | 278 | regular | other |
| Circle View Elementary | 582 | regular | elementary |
| Circles Of Success Learning Academy | 195 | regular | elementary |
| CIRCLEVILLE ELEMENTARY SCHOOL | 484 | regular | other |
| Circleville Elementary School | 1,110 | regular | other |
| Circleville High School | 528 | regular | high |
| CIRCLEVILLE MIDDLE SCHOOL | 466 | regular | middle |
| Circleville Middle School | 476 | regular | middle |
| Circleville School | 105 | regular | elementary |
| Cirrus Charter Academy | 429 | regular | elementary |
| CIS Academy | 234 | alternative | other |
| CIS Academy | 114 | regular | middle |
| CISCO EL | 428 | regular | other |
| CISCO H S | 225 | regular | high |
| CISCO J H | 170 | regular | middle |
| Cisne High School | 104 | regular | high |
| Cisne Middle School | 115 | regular | elementary |
| CISNEROS PRE-K CTR | 355 | regular | other |
| Cissna Park Elementary School | 128 | regular | elementary |
| CITIZEN EDMOND GENET SCHOOL | 493 | regular | other |
| Citizens Academy Southeast | 667 | regular | elementary |
| Citizens Leadership Academy East | 489 | regular | elementary |
| Citizens of the World Charter School East Valley | 441 | regular | elementary |
| Citizens of the World Charter School Hollywood | 446 | regular | elementary |
| Citizens of the World Charter School Mar Vista | 497 | regular | elementary |
| Citizens of the World Charter School Silver Lake | 718 | regular | elementary |
| Citizens of the World Charter School West Valley | 409 | regular | elementary |
| CITIZENSHIP AND SCIENCE ACADEMY OF ROCHESTER CHARTER SCHOOL | 361 | regular | elementary |
| CITIZENSHIP AND SCIENCE ACADEMY OF SYRACUSE CHARTER SCHOOL | 764 | regular | elementary |
| Citronelle High School | 734 | regular | high |
| Citrus Avenue Elementary | 383 | regular | elementary |
| CITRUS COVE ELEMENTARY SCHOOL | 1,137 | regular | other |