List of counties in Washington

Table columns:
County
FIPS code[7]
County seat[8]
Established[8]
Origin[2]
Etymology[2]
Population[8]
Area[8]
Map

Table rows:
cells: Adams County
1
Ritzville
1883
Whitman County
John Adams (1735–1826), 2nd U.S. President, John Quincy Adams (1767-1848), 6th U.S. President
18,728
1,925 sq mi(4,986 km2)
cells: Asotin County
3
Asotin
1883
Garfield County
The Nez Percé name for Eel Creek
21,623
636 sq mi(1,647 km2)
cells: Benton County
5
Prosser
1905
Yakima and Klickitat Counties
Thomas Hart Benton (1782–1858), a Missouri U.S. Senator
175,177
1,703 sq mi(4,411 km2)
cells: Chelan County
7
Wenatchee
1899
Okanogan and Kittitas Counties
A Native American word meaning "deep water", likely referring to Lake Chelan
72,453
2,922 sq mi(7,568 km2)
cells: Clallam County
9
Port Angeles
1854
Jefferson County
A Klallam word meaning "the strong people"
71,404
1,745 sq mi(4,520 km2)
cells: Clark County
11
Vancouver
1845
Original county
William Clark (1770–1838), the co-captain of the Lewis and Clark Expedition
425,363
628 sq mi(1,627 km2)
cells: Columbia County
13
Dayton
1875
Walla Walla County
The Columbia River
4,078
869 sq mi(2,251 km2)
cells: Cowlitz County
15
Kelso
1854
Original county
Cowlitz, an Indian tribe
102,410
1,139 sq mi(2,950 km2)
cells: Douglas County
17
Waterville
1883
Lincoln County
Stephen A. Douglas (1813–1861), U.S. Senator from Illinois
38,431
1,821 sq mi(4,716 km2)
cells: Ferry County
19
Republic
1899
Stevens County
Elisha P. Ferry (1825–1895), 1st Governor of Washington State
7,551
2,204 sq mi(5,708 km2)
cells: Franklin County
21
Pasco
1883
Whitman County
Benjamin Franklin (1706–1790), writer, orator, inventor, and U.S. Founding Father
78,163
1,242 sq mi(3,217 km2)
cells: Garfield County
23
Pomeroy
1881
Columbia County
James A. Garfield (1831–1881), 20th U.S. President
2,266
710 sq mi(1,839 km2)
cells: Grant County
25
Ephrata
1909
Douglas County
Ulysses S. Grant (1822–1885), 18th U.S. President
89,120
2,681 sq mi(6,944 km2)
cells: Grays Harbor County
27
Montesano
1854
Thurston County
Grays Harbor, a body of water named after explorer and merchant Robert Gray (1755–1806)
72,797
1,917 sq mi(4,965 km2)
cells: Island County
29
Coupeville
1853
Thurston County
Whidbey and Camano Islands
78,506
209 sq mi(541 km2)
cells: Jefferson County
31
Port Townsend
1852
Thurston County
Thomas Jefferson (1743–1826), 3rd U.S. President and principal author of the Declaration of Independence
29,872
1,809 sq mi(4,685 km2)
cells: King County
33
Seattle
1852
Thurston County
William R. King (1786–1853), U.S. Vice President under Franklin Pierce; officially renamed in 1986 after Martin Luther King, Jr. (1929–1968)
1,931,249
2,126 sq mi(5,506 km2)
cells: Kitsap County
35
Port Orchard
1857
King and Jefferson Counties
Chief Kitsap (d. 1860), leader of the Suquamish tribe
251,133
396 sq mi(1,026 km2)
cells: Kittitas County
37
Ellensburg
1883
Yakima County
Kittitas tribe word of uncertain meaning, with popular translations ranging from "white chalk" to "land of the plenty"
40,915
2,297 sq mi(5,949 km2)
cells: Klickitat County
39
Goldendale
1859
Walla Walla County
Klickitat Tribe
20,318
1,872 sq mi(4,848 km2)
cells: Lewis County
41
Chehalis
1845
Original county
Meriwether Lewis (1774–1809), the co-captain of the Lewis and Clark Expedition
75,455
2,408 sq mi(6,237 km2)
cells: Lincoln County
43
Davenport
1883
Whitman County
Abraham Lincoln (1809–1865), 16th U.S. President
10,570
2,311 sq mi(5,985 km2)
cells: Mason County
45
Shelton
1854
King County
Charles H. Mason (1830–1859), 1st Secretary of Washington Territory
60,699
961 sq mi(2,489 km2)
cells: Okanogan County
47
Okanogan
1888
Stevens County
A Salish Native American word meaning "rendezvous"
41,120
5,268 sq mi(13,644 km2)
cells: Pacific County
49
South Bend
1851
Lewis County
The Pacific Ocean
20,920
975 sq mi(2,525 km2)
cells: Pend Oreille County
51
Newport
1911
Stevens County
The Pend d'Oreille Native American tribe
13,001
1,400 sq mi(3,626 km2)
cells: Pierce County
53
Tacoma
1852
Thurston County
Franklin Pierce (1804–1869), 14th U.S. President
795,225
1,676 sq mi(4,341 km2)
cells: San Juan County
55
Friday Harbor
1873
Whatcom County
San Juan Island
15,769
175 sq mi(453 km2)
cells: Skagit County
57
Mount Vernon
1883
Whatcom County
The Skagit Native American tribe
116,901
1,735 sq mi(4,494 km2)
cells: Skamania County
59
Stevenson
1854
Clark County
A Chinookan word meaning "swift water"
11,066
1,656 sq mi(4,289 km2)
cells: Snohomish County
61
Everett
1861
Island County
The Snohomish tribe
713,335
2,090 sq mi(5,413 km2)
cells: Spokane County
63
Spokane
1879 a
Stevens County
The Spokane Native American tribe
471,221
1,764 sq mi(4,569 km2)
cells: Stevens County
65
Colville
1863
Walla Walla County
Isaac Stevens (1818–1862), 1st Governor of the Washington Territory
43,531
2,478 sq mi(6,418 km2)
cells: Thurston County
67
Olympia
1852
Lewis County
Samuel Thurston (1815–1851), the Oregon Territory's first delegate to U.S. Congress
252,264
727 sq mi(1,883 km2)
cells: Wahkiakum County
69
Cathlamet
1854
Cowlitz County
Leader of Wahkiakum ("Tall Timber"), Native American tribe
3,978
264 sq mi(684 km2)
cells: Walla Walla County
71
Walla Walla
1854
Skamania County
The Walla Walla Native American tribe, and also another name for running water
58,781
1,270 sq mi(3,289 km2)
cells: Whatcom County
73
Bellingham
1854
Island County
Nooksack word meaning "noisy water"
201,140
2,120 sq mi(5,491 km2)
cells: Whitman County
75
Colfax
1871
Stevens County
Marcus Whitman (1802–1847), a Methodist missionary
44,776
2,159 sq mi(5,592 km2)
cells: Yakima County
77
Yakima
1865
Ferguson County (defunct)
The Yakama Native American tribe
243,231
4,296 sq mi(11,127 km2)

Questions about this table:
originalText: what is the largest county in population in washington state
answer: answerTexts: King County