Washington ZIP codes
Washington holds 716 ZIP codes between 98001 and 99403. The tables rank the places and counties with the most codes; the guide below decodes the numbering.
Places with the most ZIP codes in Washington
| Place | ZIP codes |
|---|---|
| Seattle | 59 |
| Tacoma | 35 |
| Spokane | 28 |
| Vancouver | 14 |
| Olympia | 11 |
| Bellevue | 7 |
| Kent | 7 |
| Everett | 7 |
| Yakima | 7 |
| Renton | 5 |
| Bremerton | 5 |
| Puyallup | 5 |
| Lakewood | 5 |
| Bellingham | 5 |
| Auburn | 4 |
| Federal Way | 4 |
| Bothell | 4 |
| Lynnwood | 4 |
| Kennewick | 3 |
| Kirkland | 3 |
Washington counties by ZIP count
| County | ZIP codes |
|---|---|
| King | 120 |
| Pierce | 79 |
| Spokane | 53 |
| Snohomish | 37 |
| Kitsap | 26 |
| Yakima | 25 |
| Clark | 23 |
| Lewis | 22 |
| Whitman | 22 |
| Grays Harbor | 21 |
Reading a Washington ZIP code
Washington holds 716 ZIP codes between 98001 and 99403, spread over 39 counties. Seattle leads the state with 59 codes, ahead of Tacoma with 35. Every code here opens with the digit 9: that opening number is the national postal region Washington belongs to, the next two digits name the sectional center that sorts the mail, and the final two point to the local office. A ZIP+4 suffix narrows delivery to a block face. Boundaries follow carrier routes rather than city limits, which is why Seattle spreads across 59 codes while some rural codes cross county lines.
Source: GeoNames postal dataset (CC BY 4.0), snapshot of 2026-07-09. Counts cover standard delivery ZIPs listed for Washington; unique and PO box codes may add to these totals.
Last updated: · Methodology and sources