The state of Washington, USA is currently served by a total of 6 area codes:
These Washington area codes overlay (cover the same geographic area). The first code listed is the parent code. Overlay area codes are added when no more phone numbers are available in an existing Numbering Plan Area.
| City | County | Area Codes |
|---|---|---|
| Auburn | King | 253 |
| Bellevue | King | 425 |
| Bellingham | Whatcom | 360, 564 |
| Bothell | King | 425 |
| Bremerton | Kitsap | 360, 564 |
| Des Moines | King | 206 |
| Edmonds | Snohomish | 425 |
| Everett | Snohomish | 425 |
| Federal Way | King | 253 |
| Issaquah | King | 425 |
| Kennewick | Benton | 509 |
| Kent | King | 253 |
| Kirkland | King | 425 |
| Lacey | Thurston | 360, 564 |
| Lake Stevens | Snohomish | 425 |
| Lakewood | Pierce | 253 |
| Longview | Cowlitz | 360, 564 |
| Lynnwood | Snohomish | 425 |
| Marysville | Snohomish | 360, 564 |
| Mount Vernon | Skagit | 360, 564 |
| Olympia | Thurston | 360, 564 |
| Pasco | Franklin | 509 |
| Pullman | Whitman | 509 |
| Puyallup | Pierce | 253 |
| Redmond | King | 425 |
| Renton | King | 425 |
| Richland | Benton | 509 |
| Sammamish | King | 425 |
| Seattle | King | 206 |
| Spokane | Spokane | 509 |
| Tacoma | Pierce | 253 |
| University Place | Pierce | 253 |
| Vancouver | Clark | 360, 564 |
| Walla Walla | Walla Walla | 509 |
| Wenatchee | Chelan | 509 |
| Yakima | Yakima | 509 |