Founded in 1888, Okanogan County is one of 39 counties in the state of Washington. Historically, Okanogan County was formed from Stevens County. The city of Okanogan is the county seat. With FIPS code of 47, Okanogan County has a population of 42,104 and area of 5,268 square miles (13,644 km2).
List of all cities in Okanogan County, WA alphabetically
| City/Town | Postal Code | Area Code |
| Aeneas, WA | 98855 | 509 |
| Azwell, WA | 98846 | 509 |
| Bodie, WA | 98859 | 509 |
| Brewster, WA | 98812 | 509 |
| Carlton, WA | 98814 | 509 |
| Chesaw, WA | 98844 | 509 |
| Conconully, WA | 98819 | 509 |
| Coulee Dam, WA | 99116 | 509 |
| Disautel, WA | 98841 | 509 |
| Ellisford, WA | 98855 | 509 |
| Elmer City, WA | 99124 | 509 |
| Havillah, WA | 98855 | 509 |
| Loomis, WA | 98827 | 509 |
| Malott, WA | 98829 | 509 |
| Mason City, WA | 99116 | 509 |
| Mazama, WA | 98833 | 509 |
| Methow, WA | 98834 | 509 |
| Molson, WA | 98844 | 509 |
| Monse, WA | 98812 | 509 |
| Nespelem, WA | 99155 | 509 |
| Nighthawk, WA | 98855 | 509 |
| Okanogan, WA | 98840 | 509 |
| Omak, WA | 98841 | 509 |
| Oroville, WA | 98844 | 509 |
| Pateros, WA | 98846 | 509 |
| Riverside, WA | 98849 | 509 |
| Rocky Butte, WA | 98812 | 509 |
| Synarep, WA | 98849 | 509 |
| Tonasket, WA | 98855 | 509 |
| Twisp, WA | 98856 | 509 |
| Wauconda, WA | 98859 | 509 |
| Winthrop, WA | 98862 | 509 |