How to use this list
Counties are sorted alphabetically. Use ZIP count and population to spot larger counties, then open a county for its ZIP roster and income/housing averages.
Washington counties
39 counties · 605 ZIP codes · population 7,740,873 . Select a county to open its ZIP table and local summary.
Related pages
Also see the Washington overview, cities, rankings, and congressional districts.
| County | ZIP codes | Population | Avg. income |
|---|---|---|---|
| Adams County | 5 | 23,143 | $68,773 |
| Asotin County | 3 | 22,460 | $70,034 |
| Benton County | 11 | 233,336 | $86,936 |
| Chelan County | 13 | 79,575 | $74,092 |
| Clallam County | 8 | 73,354 | $55,617 |
| Clark County | 18 | 485,846 | $98,809 |
| Columbia County | 2 | 3,702 | $60,867 |
| Cowlitz County | 10 | 115,695 | $78,341 |
| Douglas County | 9 | 44,945 | $65,815 |
| Ferry County | 9 | 12,522 | $73,351 |
| Franklin County | 5 | 96,911 | $85,823 |
| Garfield County | 1 | 2,467 | $61,741 |
| Grant County | 14 | 96,593 | $69,512 |
| Grays Harbor County | 20 | 77,475 | $62,102 |
| Island County | 8 | 86,747 | $91,856 |
| Jefferson County | 8 | 37,552 | $71,224 |
| King County | 86 | 2,274,423 | $131,587 |
| Kitsap County | 20 | 276,228 | $104,935 |
| Kittitas County | 10 | 44,696 | $87,562 |
| Klickitat County | 14 | 22,303 | $70,437 |
| Lewis County | 21 | 85,796 | $67,544 |
| Lincoln County | 12 | 11,827 | $76,764 |
| Mason County | 9 | 65,451 | $83,016 |
| Okanogan County | 19 | 43,606 | $63,019 |
| Pacific County | 13 | 24,705 | $68,688 |
| Pend Oreille County | 6 | 12,948 | $58,762 |
| Pierce County | 57 | 916,052 | $96,228 |
| San Juan County | 9 | 18,086 | $84,806 |
| Skagit County | 13 | 131,941 | $83,535 |
| Skamania County | 7 | 33,529 | $78,832 |
| Snohomish County | 27 | 831,810 | $107,464 |
| Spokane County | 40 | 553,142 | $79,162 |
| Stevens County | 17 | 33,664 | $52,505 |
| Thurston County | 14 | 294,708 | $91,595 |
| Wahkiakum County | 3 | 4,150 | $58,169 |
| Walla Walla County | 8 | 62,244 | $76,569 |
| Whatcom County | 16 | 226,483 | $87,092 |
| Whitman County | 20 | 47,251 | $64,531 |
| Yakima County | 20 | 233,507 | $65,145 |
Frequently asked questions
- How many counties are listed for Washington?
- US5 currently lists 39 counties with published ZIP coverage in Washington. Counts can change as geography publishes update.
- What happens when I open a county?
- Each county page shows ZIP totals, income and housing averages, and a ZIP table. From there you can open any ZIP for a full demographics dashboard.