| City | Area Code | Dialing Code |
|---|---|---|
| Auburn | 253 | +1 253 |
| Bainbridge Island | 206 | +1 206 |
| Bellevue | 425 | +1 425 |
| Bellingham | 360 | +1 360 |
| Bothell | 425 | +1 425 |
| Bremerton | 360 | +1 360 |
| Burien | 206 | +1 206 |
| City of Sammamish | 425 | +1 425 |
| Cottage Lake | 425 | +1 425 |
| Des Moines | 206 | +1 206 |
| East Hill-Meridian | 253 | +1 253 |
| Edmonds | 425 | +1 425 |
| Everett | 425 | +1 425 |
| Fairwood | 425 | +1 425 |
| Federal Way | 253 | +1 253 |
| Inglewood-Finn Hill | 425 | +1 425 |
| Kennewick | 509 | +1 509 |
| Kirkland | 425 | +1 425 |
| Lacey | 360 | +1 360 |
| Lakewood | 253 | +1 253 |
| Longview | 360 | +1 360 |
| Lynnwood | 425 | +1 425 |
| Marysville | 360 | +1 360 |
| Marysville | 360 | +1 360 |
| Mercer Island | 206 | +1 206 |
| Mount Vernon | 360 | +1 360 |
| Mountlake Terrace | 425 | +1 425 |
| North Creek | 425 | +1 425 |
| Olympia | 360 | +1 360 |
| Opportunity | 509 | +1 509 |
| Parkland | 253 | +1 253 |
| Pasco | 509 | +1 509 |
| Pullman | 509 | +1 509 |
| Puyallup | 253 | +1 253 |
| Redmond | 425 | +1 425 |
| Renton | 425 | +1 425 |
| Seattle | 206 | +1 206 |
| Shoreline | 206 | +1 206 |
| South Hill | 253 | +1 253 |
| Spanaway | 253 | +1 253 |
| Spokane | 509 | +1 509 |
| Tacoma | 253 | +1 253 |
| University Place | 253 | +1 253 |
| Vancouver | 360 | +1 360 |
| Walla Walla | 509 | +1 509 |
| Wenatchee | 509 | +1 509 |
| West Richland | 509 | +1 509 |
| White Center | 206 | +1 206 |
| Yakima | 509 | +1 509 |