How many counties in Washington? All 39 listed
Quick answer
Washington has 39 counties and county equivalents holding 7,740,984 residents. The most populous county in Washington is King County with 2,262,713 residents; the smallest is Garfield County. County boundaries divide the state's land area — measured in square miles by the Census Bureau — into the units used for property assessment, elections and local sales tax. The statewide sales tax base rate is 6.5%, before county and city add-ons.
All 39 counties
Ranked by population, Census 2019-2023 ACS 5-year estimates.
| County | Population | Median income | Median home value | Median rent |
|---|---|---|---|---|
| King County | 2,262,713 | $122,148 | $811,200 | $2,035 |
| Pierce County | 924,106 | $96,632 | $484,400 | $1,722 |
| Snohomish County | 834,648 | $107,982 | $644,600 | $1,866 |
| Spokane County | 544,323 | $73,513 | $370,500 | $1,200 |
| Clark County | 510,516 | $94,948 | $487,900 | $1,668 |
| Thurston County | 296,640 | $93,985 | $451,500 | $1,634 |
| Kitsap County | 276,581 | $98,546 | $505,700 | $1,741 |
| Yakima County | 256,605 | $68,015 | $281,100 | $1,068 |
| Whatcom County | 228,432 | $80,989 | $536,100 | $1,465 |
| Benton County | 210,224 | $87,316 | $369,400 | $1,256 |
| Skagit County | 130,407 | $85,474 | $486,200 | $1,439 |
| Cowlitz County | 111,539 | $72,932 | $367,400 | $1,169 |
| Grant County | 100,428 | $71,115 | $275,700 | $1,059 |
| Franklin County | 97,676 | $82,755 | $345,700 | $1,171 |
| Island County | 86,747 | $88,358 | $535,300 | $1,631 |
| Lewis County | 83,925 | $69,690 | $341,500 | $1,044 |
| Chelan County | 79,518 | $78,306 | $454,900 | $1,182 |
| Clallam County | 77,593 | $67,999 | $385,600 | $1,110 |
| Grays Harbor County | 76,397 | $63,539 | $279,500 | $1,018 |
| Mason County | 66,968 | $78,359 | $377,400 | $1,205 |
| Walla Walla County | 62,102 | $72,212 | $375,600 | $1,113 |
| Stevens County | 47,470 | $67,405 | $308,000 | $864 |
| Whitman County | 47,042 | $52,893 | $323,300 | $1,002 |
| Kittitas County | 44,736 | $69,928 | $459,900 | $1,253 |
| Douglas County | 43,733 | $80,374 | $402,900 | $1,234 |
| Okanogan County | 42,811 | $60,293 | $284,200 | $868 |
| Jefferson County | 33,313 | $71,143 | $495,100 | $1,291 |
| Pacific County | 23,750 | $62,350 | $274,000 | $962 |
| Klickitat County | 23,082 | $70,400 | $388,700 | $1,119 |
| Asotin County | 22,424 | $69,107 | $286,200 | $994 |
| Adams County | 20,690 | $65,042 | $251,300 | $901 |
| San Juan County | 18,266 | $83,682 | $726,500 | $1,413 |
| Pend Oreille County | 13,811 | $63,750 | $307,800 | $786 |
| Skamania County | 12,276 | $90,085 | $472,600 | $1,024 |
| Lincoln County | 11,271 | $71,227 | $272,300 | $872 |
| Ferry County | 7,326 | $54,650 | $274,500 | $703 |
| Wahkiakum County | 4,573 | $57,091 | $344,500 | $1,086 |
| Columbia County | 3,996 | $71,528 | $256,100 | $944 |
| Garfield County | 2,326 | $62,411 | $214,200 | $768 |
Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year
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