| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Cabarton | city | Idaho | United States | 44.43556 | -116.03917 | 4799 | 33 |
| Cabinet | city | Idaho | United States | 48.08444 | -116.0725 | 2273 | 171 |
| Cable Car Crossing | city | Idaho | United States | 45.45389 | -115.94194 | 3221 | 43 |
| Cache | city | Idaho | United States | 43.78806 | -111.16222 | 6145 | 453 |
| Calder | city | Idaho | United States | 47.27778 | -116.19028 | 2198 | 33 |
| Caldwell | city | Idaho | United States | 43.66306 | -116.68639 | 2395 | 28917 |
| Calendar | city | Idaho | United States | 45.62417 | -115.66889 | 7030 | 14 |
| Camas | city | Idaho | United States | 44.0075 | -112.22028 | 4832 | 158 |
| Cambridge | city | Idaho | United States | 44.57278 | -116.675 | 2700 | 75 |
| Cambridge | city | Idaho | United States | 42.45056 | -112.11583 | 4940 | 322 |
| Cameron | city | Idaho | United States | 46.60583 | -116.57111 | 2559 | 357 |
| Camp Creek Summer Home Area | city | Idaho | United States | 44.17389 | -115.22139 | 5295 | 61 |
| Canfield | city | Idaho | United States | 45.83778 | -116.37083 | 4199 | 376 |
| Canyon | city | Idaho | United States | 47.57528 | -116.41167 | 2201 | 252 |
| Cape Horn historical | city | Idaho | United States | 44.405 | -115.16722 | 6597 | 14 |
| Carbon Center | city | Idaho | United States | 47.55833 | -115.9 | 3225 | 126 |
| Carbonate historical | city | Idaho | United States | 47.45528 | -115.76389 | 4104 | 38 |
| Cardiff | city | Idaho | United States | 46.57444 | -115.81139 | 3602 | 61 |
| Cardiff Mill | city | Idaho | United States | 46.47083 | -115.79361 | 3248 | 61 |
| Cardwell | city | Idaho | United States | 47.20917 | -116.5625 | 2677 | 520 |
| Carey | city | Idaho | United States | 43.30778 | -113.94389 | 4776 | 98 |
| Careywood | city | Idaho | United States | 48.03472 | -116.64222 | 2296 | 697 |
| Caribel | city | Idaho | United States | 46.25806 | -115.94361 | 3008 | 64 |
| Caribou City | city | Idaho | United States | 43.10306 | -111.26389 | 7001 | 28 |
| Carmen | city | Idaho | United States | 45.2425 | -113.8925 | 3920 | 150 |
| Carothers Place historical | city | Idaho | United States | 42.88361 | -116.43194 | 3599 | 19 |
| Carrietown | city | Idaho | United States | 43.605 | -114.69944 | 7631 | 116 |
| Cascade | city | Idaho | United States | 44.51639 | -116.04083 | 4799 | 33 |
| Castle Rocks | city | Idaho | United States | 43.32833 | -115.31361 | 5278 | 61 |
| Castleford | city | Idaho | United States | 42.52083 | -114.8675 | 3897 | 1310 |
| Casto | city | Idaho | United States | 44.56806 | -114.84778 | 5800 | 14 |
| Cataldo | city | Idaho | United States | 47.54889 | -116.32861 | 2198 | 727 |
| Cathedral Pines | city | Idaho | United States | 43.7775 | -114.52583 | 7135 | 140 |
| Cavendish | city | Idaho | United States | 46.56028 | -116.43306 | 2998 | 743 |
| Cayuse Junction | city | Idaho | United States | 46.59917 | -114.85306 | 5810 | 42 |
| Cedar | city | Idaho | United States | 42.59389 | -114.70472 | 3795 | 1947 |
| Cedar Creek | city | Idaho | United States | 48.01833 | -116.44528 | 2667 | 229 |
| Cedarhill | city | Idaho | United States | 42.26694 | -112.73056 | 5396 | 137 |
| Cedron | city | Idaho | United States | 43.62222 | -111.19028 | 6125 | 404 |
| Centerville | city | Idaho | United States | 43.91278 | -115.89139 | 4199 | 145 |
| Central | city | Idaho | United States | 42.635 | -111.81083 | 5518 | 299 |
| Central Cove | city | Idaho | United States | 43.60722 | -116.86167 | 2424 | 2731 |
| Cerro Grande | city | Idaho | United States | 43.44111 | -112.9325 | 4999 | 105 |
| Chalk Cut | city | Idaho | United States | 42.98111 | -115.53222 | 2824 | 784 |
| Challis | city | Idaho | United States | 44.50472 | -114.23083 | 5180 | 46 |
| Chambers historical | city | Idaho | United States | 46.925 | -116.78278 | 2598 | 369 |
| Chapin | city | Idaho | United States | 43.64333 | -111.11 | 6197 | 445 |
| Chatcolet | city | Idaho | United States | 47.37222 | -116.7625 | 2155 | 367 |
| Chausse | city | Idaho | United States | 42.18083 | -111.08306 | 6197 | 227 |
| Cherry Creek | city | Idaho | United States | 42.09833 | -112.22806 | 4573 | 140 |
| Cherrylane | city | Idaho | United States | 46.51611 | -116.68056 | 997 | 389 |
| Cherryville | city | Idaho | United States | 42.04056 | -111.74861 | 5065 | 1053 |
| Chesley | city | Idaho | United States | 46.34917 | -116.55194 | 3451 | 370 |
| Chester | city | Idaho | United States | 43.99944 | -111.56917 | 5127 | 1575 |
| Chesterfield | city | Idaho | United States | 42.86694 | -111.90111 | 5396 | 297 |
| Chilco | city | Idaho | United States | 47.86389 | -116.74556 | 2496 | 1371 |
| Chilly | city | Idaho | United States | 44.07778 | -113.87806 | 6249 | 56 |
| China Hat | city | Idaho | United States | 42.10167 | -115.93917 | 6000 | 19 |
| China Hill | city | Idaho | United States | 42.55278 | -111.82667 | 5347 | 299 |
| Chubbuck | city | Idaho | United States | 42.92083 | -112.46528 | 4547 | 27811 |
| Clagstone | city | Idaho | United States | 48.01972 | -116.80556 | 2244 | 713 |
| Clarendon Hot Springs | city | Idaho | United States | 43.55944 | -114.41417 | 5741 | 615 |
| Clark Fork | city | Idaho | United States | 48.14528 | -116.17472 | 2116 | 168 |
| Clark Tree | city | Idaho | United States | 46.29694 | -115.71056 | 3605 | 29 |
| Clarkia | city | Idaho | United States | 47.01083 | -116.25194 | 2985 | 46 |
| Clarkson | city | Idaho | United States | 43.21167 | -112.41778 | 4478 | 2779 |
| Clarksville | city | Idaho | United States | 47.75389 | -116.73194 | 2627 | 11857 |
| Clawson | city | Idaho | United States | 43.79806 | -111.11 | 6197 | 441 |
| Clayton | city | Idaho | United States | 44.25944 | -114.40083 | 6190 | 14 |
| Claytonia | city | Idaho | United States | 43.5675 | -116.83194 | 2299 | 2010 |
| Clearwater | city | Idaho | United States | 46.0225 | -115.89 | 2496 | 177 |
| Cleft | city | Idaho | United States | 43.23944 | -115.84972 | 3225 | 460 |
| Clementsville | city | Idaho | United States | 43.87667 | -111.36917 | 6099 | 475 |
| Cleveland | city | Idaho | United States | 42.34 | -111.7125 | 5351 | 462 |
| Clicks | city | Idaho | United States | 46.28028 | -116.53389 | 3530 | 258 |
| Cliff historical | city | Idaho | United States | 43.87583 | -113.67722 | 7834 | 56 |
| Cliffs | city | Idaho | United States | 42.63917 | -116.97944 | 5095 | 18 |
| Clifton | city | Idaho | United States | 42.19 | -112.00722 | 4878 | 443 |
| Clover | city | Idaho | United States | 42.51417 | -114.68667 | 4081 | 1337 |
| Clover historical | city | Idaho | United States | 45.13389 | -114.99472 | 4491 | 32 |
| Cloverdale | city | Idaho | United States | 43.61972 | -116.33306 | 2664 | 83108 |
| Clyde | city | Idaho | United States | 44.13583 | -113.24611 | 5875 | 56 |
| Cobalt | city | Idaho | United States | 45.09306 | -114.23083 | 5751 | 56 |
| Cocolalla | city | Idaho | United States | 48.10806 | -116.61639 | 2335 | 576 |
| Coeur d'Alene | city | Idaho | United States | 47.67778 | -116.77944 | 2198 | 32092 |
| Coeur d'Alene Junction | city | Idaho | United States | 47.75667 | -116.91139 | 2221 | 11100 |
| Coffee Point | city | Idaho | United States | 43.15639 | -112.96722 | 4855 | 202 |
| Colburn | city | Idaho | United States | 48.39722 | -116.53417 | 2194 | 1214 |
| Coleman | city | Idaho | United States | 48.00417 | -116.90583 | 2303 | 978 |
| Collier Place | city | Idaho | United States | 42.57917 | -116.23944 | 5600 | 19 |
| Collins | city | Idaho | United States | 43.20222 | -112.375 | 4468 | 6186 |
| Collister subdivision | city | Idaho | United States | 43.65833 | -116.24722 | 2670 | 95912 |
| Coltman | city | Idaho | United States | 43.61778 | -112.01139 | 4786 | 4652 |
| Comical Turn | city | Idaho | United States | 42.56139 | -116.14361 | 5416 | 19 |
| Conant | city | Idaho | United States | 42.27611 | -113.44889 | 4799 | 70 |
| Concord | city | Idaho | United States | 45.58472 | -115.68278 | 7808 | 14 |
| Concrete | city | Idaho | United States | 44.35528 | -116.79444 | 2801 | 612 |
| Conda | city | Idaho | United States | 42.72833 | -111.53167 | 6397 | 112 |
| Conkling Park | city | Idaho | United States | 47.40444 | -116.75722 | 2129 | 345 |
| Connor | city | Idaho | United States | 42.28111 | -113.50056 | 4937 | 70 |
| Coolin | city | Idaho | United States | 48.47972 | -116.84833 | 2470 | 241 |
| Cooper | city | Idaho | United States | 46.44667 | -116.05389 | 3215 | 114 |
| Copeland | city | Idaho | United States | 48.90222 | -116.38778 | 1794 | 408 |
| Copperville | city | Idaho | United States | 45.75306 | -116.32333 | 2027 | 383 |
| Cora | city | Idaho | United States | 47.00389 | -116.96389 | 2746 | 368 |
| Corbin Junction | city | Idaho | United States | 47.89111 | -116.71972 | 2375 | 1336 |
| Cornwall | city | Idaho | United States | 46.70889 | -116.86472 | 2598 | 3746 |
| Cornwall | city | Idaho | United States | 47.51861 | -115.83667 | 4737 | 256 |
| Cotterel | city | Idaho | United States | 42.51722 | -113.45833 | 4570 | 70 |
| Cotton | city | Idaho | United States | 43.42639 | -112.0875 | 4655 | 8565 |
| Cottonwood | city | Idaho | United States | 46.04861 | -116.34861 | 3599 | 277 |
| Cottonwood historical | city | Idaho | United States | 42.48611 | -116.00722 | 5406 | 19 |
| Coulam | city | Idaho | United States | 42.2275 | -111.9825 | 4773 | 440 |
| Council | city | Idaho | United States | 44.73 | -116.43722 | 2995 | 112 |
| Cow Creek | city | Idaho | United States | 46.49583 | -115.93194 | 2913 | 61 |
| Cox | city | Idaho | United States | 43.37361 | -112.05278 | 4717 | 3876 |
| Craig Junction | city | Idaho | United States | 46.27556 | -116.53278 | 3697 | 258 |
| Craigmont | city | Idaho | United States | 46.24139 | -116.46611 | 3799 | 267 |
| Crane historical | city | Idaho | United States | 44.38528 | -116.44306 | 3398 | 76 |
| Cream Can Junction | city | Idaho | United States | 42.93861 | -113.38472 | 4648 | 146 |
| Crescent | city | Idaho | United States | 46.64333 | -116.42444 | 2798 | 377 |
| Crill Place | city | Idaho | United States | 42.82583 | -116.45278 | 4399 | 19 |
| Cross Trails | city | Idaho | United States | 45.47639 | -115.69083 | 5052 | 17 |
| Crossport | city | Idaho | United States | 48.70111 | -116.22028 | 1896 | 306 |
| Crouch | city | Idaho | United States | 44.11528 | -115.97 | 3198 | 87 |
| Crystal | city | Idaho | United States | 44.16722 | -116.89 | 2125 | 947 |
| Crystal | city | Idaho | United States | 42.65389 | -112.49556 | 5196 | 98 |
| Crystal historical | city | Idaho | United States | 44.2675 | -114.325 | 5429 | 30 |
| Culdesac | city | Idaho | United States | 46.37472 | -116.67222 | 1889 | 378 |
| Cully Moores | city | Idaho | United States | 46.53056 | -115.99056 | 3359 | 61 |
| Culver | city | Idaho | United States | 48.31889 | -116.455 | 2060 | 1128 |
| Cuprum | city | Idaho | United States | 45.08667 | -116.68833 | 5170 | 102 |
| Curry | city | Idaho | United States | 42.56389 | -114.55444 | 3740 | 5719 |
| Custer | city | Idaho | United States | 44.3875 | -114.695 | 8057 | 14 |
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