Largest Counties in Washington

Rank County Population County Seat Established Area (km2) Density
1 King County 1,931,238 Seattle 1852 5,506 350.75
2 Pierce County 795,214 Tacoma 1852 4,341 183.19
3 Snohomish County 713,324 Everett 1861 5,413 131.78
4 Spokane County 471,210 Spokane 1879 4,569 103.13
5 Clark County 425,352 Vancouver 1845 1,627 261.43
6 Thurston County 252,253 Olympia 1852 1,883 133.96
7 Kitsap County 251,122 Port Orchard 1857 1,026 244.76
8 Yakima County 243,220 Yakima 1865 11,127 21.86
9 Whatcom County 201,129 Bellingham 1854 5,491 36.63
10 Benton County 175,166 Prosser 1905 4,411 39.71
11 Skagit County 116,890 Mount Vernon 1883 4,494 26.01
12 Cowlitz County 102,399 Kelso 1854 2,950 34.71
13 Grant County 89,109 Ephrata 1909 6,944 12.83
14 Island County 78,495 Coupeville 1853 541 145.09
15 Franklin County 78,152 Pasco 1883 3,217 24.29
16 Lewis County 75,444 Chehalis 1845 6,237 12.1
17 Grays Harbor County 72,786 Montesano 1854 4,965 14.66
18 Chelan County 72,442 Wenatchee 1899 7,568 9.57
19 Clallam County 71,393 Port Angeles 1854 4,520 15.79
20 Mason County 60,688 Shelton 1854 2,489 24.38
21 Walla Walla County 58,770 Walla Walla 1854 3,289 17.87
22 Whitman County 44,765 Colfax 1871 5,592 8.01
23 Stevens County 43,520 Colville 1863 6,418 6.78
24 Okanogan County 41,109 Okanogan 1888 13,644 3.01
25 Kittitas County 40,904 Ellensburg 1883 5,949 6.88
26 Douglas County 38,420 Waterville 1883 4,716 8.15
27 Jefferson County 29,861 Port Townsend 1852 4,685 6.37
28 Asotin County 21,612 Asotin 1883 1,647 13.12
29 Pacific County 20,909 South Bend 1851 2,525 8.28
30 Klickitat County 20,307 Goldendale 1859 4,848 4.19
31 Adams County 18,717 Ritzville 1883 4,986 3.75
32 San Juan County 15,758 Friday Harbor 1873 453 34.79
33 Pend Oreille County 12,990 Newport 1911 3,626 3.58
34 Skamania County 11,055 Stevenson 1854 4,289 2.58
35 Lincoln County 10,559 Davenport 1883 5,985 1.76
36 Ferry County 7,540 Republic 1899 5,708 1.32
37 Columbia County 4,067 Dayton 1875 2,251 1.81
38 Wahkiakum County 3,967 Cathlamet 1854 684 5.8
39 Garfield County 2,255 Pomeroy 1881 1,839 1.23

Largest Counties in Washington

You may also like...