Founded in 1911, Pend Oreille County is one of 39 counties in the state of Washington. Historically, Pend Oreille County was formed from Stevens County. The city of Newport is the county seat. With FIPS code of 51, Pend Oreille County has a population of 13,401 and area of 1,400 square miles (3,626 km2).
List of all cities in Pend Oreille County, WA alphabetically
| City/Town | Postal Code | Area Code |
| Cusick, WA | 99119 | 509 |
| Ione, WA | 99139 | 509 |
| Metaline, WA | 99152 | 509 |
| Metaline Falls, WA | 99153 | 509 |
| Newport, WA | 99156 | 509 |
| Usk, WA | 99180 | 509 |