Towns
| State | City/Town | Town Title |
|---|---|---|
| Washington | Chimacum | Chimacum, WA |
| Washington | Chinook | Chinook, WA |
| Washington | Cinebar | Cinebar, WA |
| Washington | Clallam Bay | Clallam Bay, WA |
| Washington | Clarkston | Clarkston, WA |
| Washington | Clayton | Clayton, WA |
| Washington | Cle Elum | Cle Elum, WA |
| Washington | Clearlake | Clearlake, WA |
| Washington | Clinton | Clinton, WA |
| Washington | Colbert | Colbert, WA |
| Washington | Colfax | Colfax, WA |
| Washington | College Place | College Place, WA |
| Washington | Colton | Colton, WA |
| Washington | Colville | Colville, WA |
| Washington | Conconully | Conconully, WA |
| Washington | Concrete | Concrete, WA |
| Washington | Connell | Connell, WA |
| Washington | Conway | Conway, WA |
| Washington | Copalis Beach | Copalis Beach, WA |
| Washington | Copalis Crossing | Copalis Crossing, WA |
| Washington | Cosmopolis | Cosmopolis, WA |
| Washington | Cougar | Cougar, WA |
| Washington | Coulee City | Coulee City, WA |
| Washington | Coulee Dam | Coulee Dam, WA |
| Washington | Coupeville | Coupeville, WA |