| Name | Grades | City | Phone number | |
|---|---|---|---|---|
| Cassia Memorial Hospital Library | Burley | (208) 678-4444 | ||
| Castleford School |
Elementary Middle/Junior high Senior high |
Castleford | (208) 537-6511 | |
| Catholic Diocese of Boise Library | Boise | (208) 342-1311 | ||
| Cavendish-Teakean Elementary School | Elementary | Lenore | (208) 476-5393 | |
| Cecil D. Andrus Elementary School | Elementary | Boise | (208) 939-3400 | |
| Centennial Elementary School | Elementary | Nampa | (208) 465-2711 | |
| Centennial Elementary School | Elementary | Lewiston | (208) 748-3583 | |
| Centennial High School | Senior high | Boise | (208) 939-1404 | |
| Centerpoint High School (Alt.) | Senior high | Caldwell | (208) 454-0255 | |
| Central Canyon Elementary School | Elementary | Caldwell | (208) 459-3367 | |
| Central Elementary School | Elementary | Nampa | (208) 465-2716 | |
| Central Elementary School | Elementary | St. Anthony | (208) 624-7422 | |
| Central Elementary School | Elementary | Jerome | (208) 324-3396 | |
| Central Elementary School | Elementary | Sugar City | (208) 356-9351 | |
| Central High School (Alt.) | Senior high | Rexburg | (208) 359-2337 | |
| Century High School | Senior high | Pocatello | (208) 478-6863 | |
| Ch2m Hill Library | Boise | (208) 345-5310 | ||
| Challenger Christian Academy | Elementary | Post Falls | (208) 773-5200 | |
| Challenger School - Boise | Elementary | Boise | (208) 338-9500 | |
| Challenger School - Meridian |
Elementary Middle/Junior high |
Meridian | (208) 846-8888 | |
| Challis Elementary School | Elementary | Challis | (208) 879-2439 | |
| Challis Junior/Senior High School | Senior high | Challis | (208) 879-2255 | |
| Challis Public Library | Challis | (208) 879-4267 | ||
| Chaparral Elementary School | Elementary | Meridian | (208) 893-9740 | |
| Chief Joseph Elementary School | Elementary | Meridian | (208) 888-5462 | |
| Children's School | Elementary | Boise | (208) 343-6840 | |
| Christine Donnell School of the Arts | Elementary | Boise | (208) 362-3718 | |
| Chubbuck Elementary School | Elementary | Chubbuck | (208) 237-2271 | |
| Clair E. Gale Jr. High School | Middle/Junior high | Idaho Falls | (208) 525-7720 | |
| Clark County District Library | Dubois | (208) 374-5267 |