| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Cabin Creek | city | Washington | United States | 47.24 | -121.23 | 2509 | |
| Cactus | city | Washington | United States | 46.61 | -118.93 | 895 | |
| Caledonia | city | Washington | United States | 47.31 | -122.43 | 200 | |
| Calhounville | city | Washington | United States | 46.00 | -118.44 | 830 | |
| Calispell | city | Washington | United States | 48.34 | -117.30 | 2037 | |
| Calmor Cove Club Mobile Home Park | city | Washington | United States | 48.65 | -122.38 | 387 | |
| Camano | city | Washington | United States | 48.17 | -122.53 | 124 | |
| Camas | city | Washington | United States | 45.59 | -122.40 | 95 | |
| Camas | city | Washington | United States | 48.04 | -117.86 | 2509 | |
| Camden | city | Washington | United States | 48.05 | -117.24 | 1998 | |
| Camelot Mobile Estates | city | Washington | United States | 47.61 | -122.63 | 324 | |
| Camelot Square Mobile Home Park | city | Washington | United States | 47.34 | -122.30 | 830 | |
| Camp Diana | city | Washington | United States | 48.11 | -122.43 | 0 | |
| Camp Discovery | city | Washington | United States | 47.81 | -122.79 | 0 | |
| Camp Orkila | city | Washington | United States | 48.70 | -122.94 | 223 | |
| Campton | city | Washington | United States | 47.66 | -122.10 | 200 | |
| Canby | city | Washington | United States | 47.50 | -118.02 | 2509 | |
| Candlewood Estates Mobile Home Park | city | Washington | United States | 47.85 | -122.29 | 830 | |
| Canterbury Estates Mobile Home Park | city | Washington | United States | 47.18 | -122.48 | 291 | |
| Canterbury Square Mobile Home Park | city | Washington | United States | 47.75 | -122.16 | 200 | |
| Canterwood | city | Washington | United States | 47.38 | -122.59 | 200 | |
| Canyon Glen Mobile Home Park | city | Washington | United States | 47.11 | -122.35 | 400 | |
| Canyon Heights Mobile Home Park | city | Washington | United States | 47.18 | -122.36 | 383 | |
| Canyon Mobile Park | city | Washington | United States | 47.79 | -122.19 | 200 | |
| Canyon Park | city | Washington | United States | 47.79 | -122.19 | 200 | |
| Canyon Recreational Vehicle Park | city | Washington | United States | 47.79 | -122.19 | 200 | |
| Canyon Terrace Mobile Estates | city | Washington | United States | 47.17 | -122.36 | 383 | |
| Canyon View Mobile Home Park | city | Washington | United States | 47.41 | -122.20 | 410 | |
| Cap Sante | city | Washington | United States | 48.52 | -122.60 | 0 | |
| Capitol Hill | city | Washington | United States | 47.62 | -122.32 | 400 | |
| Caples | city | Washington | United States | 45.91 | -122.80 | 137 | |
| Caples Landing | city | Washington | United States | 45.91 | -122.80 | 137 | |
| Captains Choice | city | Washington | United States | 48.22 | -122.67 | 98 | |
| Carbonado | city | Washington | United States | 47.08 | -122.05 | 1177 | |
| Cardinal Estates Mobile Home Park | city | Washington | United States | 47.98 | -122.12 | 318 | |
| Carlisle | city | Washington | United States | 47.15 | -124.10 | 95 | |
| Carlisle East | city | Washington | United States | 47.14 | -124.10 | 91 | |
| Carlisle West | city | Washington | United States | 47.15 | -124.11 | 82 | |
| Carlmar | city | Washington | United States | 47.05 | -118.13 | 1797 | |
| Carlsborg | city | Washington | United States | 48.09 | -123.17 | 190 | |
| Carlsborg Mobile Estates | city | Washington | United States | 48.09 | -123.17 | 252 | |
| Carlson | city | Washington | United States | 46.70 | -122.20 | 1669 | |
| Carlson Landing | city | Washington | United States | 46.26 | -123.63 | 0 | |
| Carlton | city | Washington | United States | 48.25 | -120.12 | 1669 | |
| Carlton Park | city | Washington | United States | 47.64 | -122.41 | 200 | |
| Carlyon Beach | city | Washington | United States | 47.18 | -122.94 | 42 | |
| Carmill Station | city | Washington | United States | 47.20 | -123.09 | 200 | |
| Carnation | city | Washington | United States | 47.65 | -121.91 | 98 | |
| Carnation Mobile Haven | city | Washington | United States | 47.65 | -121.91 | 98 | |
| Carriage Club Estates Mobile Home Park | city | Washington | United States | 47.88 | -122.27 | 830 | |
| Carriage Estates Mobile Home Park | city | Washington | United States | 48.51 | -122.22 | 114 | |
| Carriage Mobile Home Court | city | Washington | United States | 47.17 | -122.47 | 298 | |
| Carrington Mobile Home Park | city | Washington | United States | 47.58 | -122.70 | 187 | |
| Carrolls | city | Washington | United States | 46.07 | -122.86 | 288 | |
| Carrs Corner | city | Washington | United States | 48.19 | -117.88 | 2598 | |
| Carson | city | Washington | United States | 45.73 | -121.82 | 406 | |
| Cascade | city | Washington | United States | 47.45 | -122.19 | 400 | |
| Cascade Green Mobile Home Park | city | Washington | United States | 47.07 | -122.33 | 830 | |
| Cascade Junction | city | Washington | United States | 47.14 | -122.08 | 830 | |
| Cascade Kamloops Trout Farm Mobile Home Park | city | Washington | United States | 48.25 | -121.61 | 830 | |
| Cascade Mobile Villa | city | Washington | United States | 47.36 | -122.14 | 400 | |
| Cascade Valley | city | Washington | United States | 47.13 | -119.33 | 1049 | |
| Cascade Vista Mobile Estates | city | Washington | United States | 47.81 | -122.19 | 331 | |
| Cascade-Fairwood | city | Washington | United States | 47.45 | -122.16 | 830 | |
| Cashmere | city | Washington | United States | 47.52 | -120.47 | 931 | |
| Cashup | city | Washington | United States | 47.06 | -117.38 | 2509 | |
| Casino Corner | city | Washington | United States | 47.92 | -122.23 | 830 | |
| Castle Rock | city | Washington | United States | 46.28 | -122.91 | 200 | |
| Castlenook (historical) | city | Washington | United States | 47.27 | -122.64 | 13 | |
| Cathan | city | Washington | United States | 48.11 | -122.28 | 400 | |
| Cathcart | city | Washington | United States | 47.85 | -122.10 | 200 | |
| Cathlamet | city | Washington | United States | 46.20 | -123.38 | 3 | |
| Cathlapotle (historical) | city | Washington | United States | 45.85 | -122.77 | 141 | |
| Cavalero Corner | city | Washington | United States | 47.98 | -122.13 | 200 |