Founded in 1859, Klickitat County is one of 39 counties in the state of Washington. Historically, Klickitat County was formed from Walla Walla County. The city of Goldendale is the county seat. With FIPS code of 39, Klickitat County has a population of 22,735 and area of 1,872 square miles (4,848 km2).
List of all cities in Klickitat County, WA alphabetically
| City/Town | Postal Code | Area Code |
| Appleton, WA | 98602 | 509 |
| Bickleton, WA | 99322 | 509 |
| Bingen, WA | 98605 | 509 |
| Centerville, WA | 98613 | 509 |
| Cook, WA | 98605 | 509 |
| Dallesport, WA | 98617 | 509 |
| Glenwood, WA | 98619 | 509 |
| Goldendale, WA | 98620 | 509 |
| Husum, WA | 98623 | 509 |
| Klickitat, WA | 98628 | 509 |
| Klickitat, WA | 98670 | 509 |
| Lyle, WA | 98635 | 509 |
| Maryhill, WA | 98620 | 509 |
| Roosevelt, WA | 99356 | 509 |
| Trout Lake, WA | 98650 | 509 |
| Troutlake, WA | 98650 | 509 |
| Wahkiacus, WA | 98670 | 509 |
| White Salmon, WA | 98672 | 509 |
| Wishram, WA | 98673 | 509 |