<P> The Federal Information Processing Standard (FIPS) code, used by the United States government to uniquely identify counties, is provided with each entry . The FIPS code links in the table point to U.S. Census "quick facts" pages for each county . </P> <P> Washington's postal abbreviation is WA and its FIPS state code is 53 . </P> <Table> <Tr> <Th> County </Th> <Th> FIPS code </Th> <Th> County seat </Th> <Th> Established </Th> <Th> Origin </Th> <Th> Etymology </Th> <Th> Population </Th> <Th> Area </Th> <Th> Map </Th> </Tr> <Tr> <Td> Adams County </Td> <Td> 001 </Td> <Td> Ritzville </Td> <Td> 1883 </Td> <Td> Whitman County </Td> <Td> John Adams (1735--1826), 2nd U.S. President, John Quincy Adams (1767 - 1848), 6th U.S. President </Td> <Td> 7004187280000000000 ♠ 18,728 </Td> <Td> 7003192500000000000 ♠ 1,925 sq mi (7003498600000000000 ♠ 4,986 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Asotin County </Td> <Td> 003 </Td> <Td> Asotin </Td> <Td> 1883 </Td> <Td> Garfield County </Td> <Td> The Nez Percé name for Eel Creek </Td> <Td> 7004216230000000000 ♠ 21,623 </Td> <Td> 7002636000000000000 ♠ 636 sq mi (7003164700000000000 ♠ 1,647 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Benton County </Td> <Td> 005 </Td> <Td> Prosser </Td> <Td> 1905 </Td> <Td> Yakima and Klickitat Counties </Td> <Td> Thomas Hart Benton (1782--1858), a Missouri U.S. Senator </Td> <Td> 7005175177000000000 ♠ 175,177 </Td> <Td> 7003170300000000000 ♠ 1,703 sq mi (7003441100000000000 ♠ 4,411 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Chelan County </Td> <Td> 007 </Td> <Td> Wenatchee </Td> <Td> 1899 </Td> <Td> Okanogan and Kittitas Counties </Td> <Td> A Native American word meaning "deep water", likely referring to Lake Chelan </Td> <Td> 7004724530000000000 ♠ 72,453 </Td> <Td> 7003292200000000000 ♠ 2,922 sq mi (7003756800000000000 ♠ 7,568 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Clallam County </Td> <Td> 009 </Td> <Td> Port Angeles </Td> <Td> 1854 </Td> <Td> Jefferson County </Td> <Td> A Klallam word meaning "the strong people" </Td> <Td> 7004714040000000000 ♠ 71,404 </Td> <Td> 7003174500000000000 ♠ 1,745 sq mi (7003452000000000000 ♠ 4,520 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Clark County </Td> <Td> 011 </Td> <Td> Vancouver </Td> <Td> 1845 </Td> <Td> Original county </Td> <Td> William Clark (1770--1838), the co-captain of the Lewis and Clark Expedition </Td> <Td> 7005425363000000000 ♠ 425,363 </Td> <Td> 7002628000000000000 ♠ 628 sq mi (7003162700000000000 ♠ 1,627 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Columbia County </Td> <Td> 013 </Td> <Td> Dayton </Td> <Td> 1875 </Td> <Td> Walla Walla County </Td> <Td> The Columbia River </Td> <Td> 7003407800000000000 ♠ 4,078 </Td> <Td> 7002869000000000000 ♠ 869 sq mi (7003225100000000000 ♠ 2,251 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Cowlitz County </Td> <Td> 015 </Td> <Td> Kelso </Td> <Td> 1854 </Td> <Td> Original county </Td> <Td> Cowlitz, an Indian tribe </Td> <Td> 7005102410000000000 ♠ 102,410 </Td> <Td> 7003113900000000000 ♠ 1,139 sq mi (7003295000000000000 ♠ 2,950 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Douglas County </Td> <Td> 017 </Td> <Td> Waterville </Td> <Td> 1883 </Td> <Td> Lincoln County </Td> <Td> Stephen A. Douglas (1813--1861), U.S. Senator from Illinois </Td> <Td> 7004384310000000000 ♠ 38,431 </Td> <Td> 7003182100000000000 ♠ 1,821 sq mi (7003471600000000000 ♠ 4,716 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Ferry County </Td> <Td> 019 </Td> <Td> Republic </Td> <Td> 1899 </Td> <Td> Stevens County </Td> <Td> Elisha P. Ferry (1825--1895), 1st Governor of Washington State </Td> <Td> 7003755100000000000 ♠ 7,551 </Td> <Td> 7003220400000000000 ♠ 2,204 sq mi (7003570800000000000 ♠ 5,708 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Franklin County </Td> <Td> 021 </Td> <Td> Pasco </Td> <Td> 1883 </Td> <Td> Whitman County </Td> <Td> Benjamin Franklin (1706--1790), writer, orator, inventor, and U.S. Founding Father </Td> <Td> 7004781630000000000 ♠ 78,163 </Td> <Td> 7003124200000000000 ♠ 1,242 sq mi (7003321700000000000 ♠ 3,217 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Garfield County </Td> <Td> 023 </Td> <Td> Pomeroy </Td> <Td> 1881 </Td> <Td> Columbia County </Td> <Td> James A. Garfield (1831--1881), 20th U.S. President </Td> <Td> 7003226600000000000 ♠ 2,266 </Td> <Td> 7002710000000000000 ♠ 710 sq mi (7003183900000000000 ♠ 1,839 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Grant County </Td> <Td> 025 </Td> <Td> Ephrata </Td> <Td> 1909 </Td> <Td> Douglas County </Td> <Td> Ulysses S. Grant (1822--1885), 18th U.S. President </Td> <Td> 7004891200000000000 ♠ 89,120 </Td> <Td> 7003268100000000000 ♠ 2,681 sq mi (7003694400000000000 ♠ 6,944 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Grays Harbor County </Td> <Td> 027 </Td> <Td> Montesano </Td> <Td> 1854 </Td> <Td> Thurston County </Td> <Td> Grays Harbor, a body of water named after explorer and merchant Robert Gray (1755--1806) </Td> <Td> 7004727970000000000 ♠ 72,797 </Td> <Td> 7003191700000000000 ♠ 1,917 sq mi (7003496500000000000 ♠ 4,965 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Island County </Td> <Td> 029 </Td> <Td> Coupeville </Td> <Td> 1853 </Td> <Td> Thurston County </Td> <Td> Whidbey and Camano Islands </Td> <Td> 7004785060000000000 ♠ 78,506 </Td> <Td> 7002209000000000000 ♠ 209 sq mi (7002541000000000000 ♠ 541 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Jefferson County </Td> <Td> 031 </Td> <Td> Port Townsend </Td> <Td> 1852 </Td> <Td> Thurston County </Td> <Td> Thomas Jefferson (1743--1826), 3rd U.S. President and principal author of the Declaration of Independence </Td> <Td> 7004298720000000000 ♠ 29,872 </Td> <Td> 7003180900000000000 ♠ 1,809 sq mi (7003468500000000000 ♠ 4,685 km) </Td> <Td> </Td> </Tr> <Tr> <Td> King County </Td> <Td> 033 </Td> <Td> Seattle </Td> <Td> 1852 </Td> <Td> Thurston County </Td> <Td> William R. King (1786--1853), U.S. Vice President under Franklin Pierce; officially renamed in 1986 after Martin Luther King, Jr. (1929--1968) </Td> <Td> 7006193124900000000 ♠ 1,931,249 </Td> <Td> 7003212600000000000 ♠ 2,126 sq mi (7003550600000000000 ♠ 5,506 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Kitsap County </Td> <Td> 035 </Td> <Td> Port Orchard </Td> <Td> 1857 </Td> <Td> King and Jefferson Counties </Td> <Td> Chief Kitsap (d . 1860), leader of the Suquamish tribe </Td> <Td> 7005251133000000000 ♠ 251,133 </Td> <Td> 7002396000000000000 ♠ 396 sq mi (7003102600000000000 ♠ 1,026 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Kittitas County </Td> <Td> 037 </Td> <Td> Ellensburg </Td> <Td> 1883 </Td> <Td> Yakima County </Td> <Td> Kittitas tribe word of uncertain meaning, with popular translations ranging from "white chalk" to "land of the plenty" </Td> <Td> 7004409150000000000 ♠ 40,915 </Td> <Td> 7003229700000000000 ♠ 2,297 sq mi (7003594900000000000 ♠ 5,949 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Klickitat County </Td> <Td> 039 </Td> <Td> Goldendale </Td> <Td> 1859 </Td> <Td> Walla Walla County </Td> <Td> Klickitat Tribe </Td> <Td> 7004203180000000000 ♠ 20,318 </Td> <Td> 7003187200000000000 ♠ 1,872 sq mi (7003484800000000000 ♠ 4,848 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Lewis County </Td> <Td> 041 </Td> <Td> Chehalis </Td> <Td> 1845 </Td> <Td> Original county </Td> <Td> Meriwether Lewis (1774--1809), the co-captain of the Lewis and Clark Expedition </Td> <Td> 7004754550000000000 ♠ 75,455 </Td> <Td> 7003240800000000000 ♠ 2,408 sq mi (7003623700000000000 ♠ 6,237 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Lincoln County </Td> <Td> 043 </Td> <Td> Davenport </Td> <Td> 1883 </Td> <Td> Whitman County </Td> <Td> Abraham Lincoln (1809--1865), 16th U.S. President </Td> <Td> 7004105700000000000 ♠ 10,570 </Td> <Td> 7003231100000000000 ♠ 2,311 sq mi (7003598500000000000 ♠ 5,985 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Mason County </Td> <Td> 045 </Td> <Td> Shelton </Td> <Td> 1854 </Td> <Td> King County </Td> <Td> Charles H. Mason (1830--1859), 1st Secretary of Washington Territory </Td> <Td> 7004606990000000000 ♠ 60,699 </Td> <Td> 7002961000000000000 ♠ 961 sq mi (7003248900000000000 ♠ 2,489 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Okanogan County </Td> <Td> 047 </Td> <Td> Okanogan </Td> <Td> 1888 </Td> <Td> Stevens County </Td> <Td> A Salish Native American word meaning "rendezvous" </Td> <Td> 7004411200000000000 ♠ 41,120 </Td> <Td> 7003526800000000000 ♠ 5,268 sq mi (7004136440000000000 ♠ 13,644 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Pacific County </Td> <Td> 049 </Td> <Td> South Bend </Td> <Td> 1851 </Td> <Td> Lewis County </Td> <Td> The Pacific Ocean </Td> <Td> 7004209200000000000 ♠ 20,920 </Td> <Td> 7002975000000000000 ♠ 975 sq mi (7003252500000000000 ♠ 2,525 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Pend Oreille County </Td> <Td> 051 </Td> <Td> Newport </Td> <Td> 1911 </Td> <Td> Stevens County </Td> <Td> The Pend d'Oreille Native American tribe </Td> <Td> 7004130010000000000 ♠ 13,001 </Td> <Td> 7003140000000000000 ♠ 1,400 sq mi (7003362600000000000 ♠ 3,626 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Pierce County </Td> <Td> 053 </Td> <Td> Tacoma </Td> <Td> 1852 </Td> <Td> Thurston County </Td> <Td> Franklin Pierce (1804--1869), 14th U.S. President </Td> <Td> 7005795225000000000 ♠ 795,225 </Td> <Td> 7003167600000000000 ♠ 1,676 sq mi (7003434100000000000 ♠ 4,341 km) </Td> <Td> </Td> </Tr> <Tr> <Td> San Juan County </Td> <Td> 055 </Td> <Td> Friday Harbor </Td> <Td> 1873 </Td> <Td> Whatcom County </Td> <Td> San Juan Island </Td> <Td> 7004157690000000000 ♠ 15,769 </Td> <Td> 7002175000000000000 ♠ 175 sq mi (7002453000000000000 ♠ 453 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Skagit County </Td> <Td> 057 </Td> <Td> Mount Vernon </Td> <Td> 1883 </Td> <Td> Whatcom County </Td> <Td> The Skagit Native American tribe </Td> <Td> 7005116901000000000 ♠ 116,901 </Td> <Td> 7003173500000000000 ♠ 1,735 sq mi (7003449400000000000 ♠ 4,494 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Skamania County </Td> <Td> 059 </Td> <Td> Stevenson </Td> <Td> 1854 </Td> <Td> Clark County </Td> <Td> A Chinookan word meaning "swift water" </Td> <Td> 7004110660000000000 ♠ 11,066 </Td> <Td> 7003165600000000000 ♠ 1,656 sq mi (7003428900000000000 ♠ 4,289 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Snohomish County </Td> <Td> 061 </Td> <Td> Everett </Td> <Td> 1861 </Td> <Td> Island County </Td> <Td> The Snohomish tribe </Td> <Td> 7005713335000000000 ♠ 713,335 </Td> <Td> 7003209000000000000 ♠ 2,090 sq mi (7003541300000000000 ♠ 5,413 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Spokane County </Td> <Td> 063 </Td> <Td> Spokane </Td> <Td> 1879 </Td> <Td> Stevens County </Td> <Td> The Spokane Native American tribe </Td> <Td> 7005471221000000000 ♠ 471,221 </Td> <Td> 7003176400000000000 ♠ 1,764 sq mi (7003456900000000000 ♠ 4,569 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Stevens County </Td> <Td> 065 </Td> <Td> Colville </Td> <Td> 1863 </Td> <Td> Walla Walla County </Td> <Td> Isaac Stevens (1818--1862), 1st Governor of the Washington Territory </Td> <Td> 7004435310000000000 ♠ 43,531 </Td> <Td> 7003247800000000000 ♠ 2,478 sq mi (7003641800000000000 ♠ 6,418 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Thurston County </Td> <Td> 067 </Td> <Td> Olympia </Td> <Td> 1852 </Td> <Td> Lewis County </Td> <Td> Samuel Thurston (1815--1851), the Oregon Territory's first delegate to U.S. Congress </Td> <Td> 7005252264000000000 ♠ 252,264 </Td> <Td> 7002727000000000000 ♠ 727 sq mi (7003188300000000000 ♠ 1,883 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Wahkiakum County </Td> <Td> 069 </Td> <Td> Cathlamet </Td> <Td> 1854 </Td> <Td> Cowlitz County </Td> <Td> Leader of Wahkiakum ("Tall Timber"), Native American tribe </Td> <Td> 7003397800000000000 ♠ 3,978 </Td> <Td> 7002264000000000000 ♠ 264 sq mi (7002684000000000000 ♠ 684 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Walla Walla County </Td> <Td> 071 </Td> <Td> Walla Walla </Td> <Td> 1854 </Td> <Td> Skamania County </Td> <Td> The Walla Walla Native American tribe, and also another name for running water </Td> <Td> 7004587810000000000 ♠ 58,781 </Td> <Td> 7003127000000000000 ♠ 1,270 sq mi (7003328900000000000 ♠ 3,289 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Whatcom County </Td> <Td> 073 </Td> <Td> Bellingham </Td> <Td> 1854 </Td> <Td> Island County </Td> <Td> Nooksack word meaning "noisy water" </Td> <Td> 7005201140000000000 ♠ 201,140 </Td> <Td> 7003212000000000000 ♠ 2,120 sq mi (7003549100000000000 ♠ 5,491 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Whitman County </Td> <Td> 075 </Td> <Td> Colfax </Td> <Td> 1871 </Td> <Td> Stevens County </Td> <Td> Marcus Whitman (1802--1847), a Methodist missionary </Td> <Td> 7004447760000000000 ♠ 44,776 </Td> <Td> 7003215900000000000 ♠ 2,159 sq mi (7003559200000000000 ♠ 5,592 km) </Td> <Td> </Td> </Tr> <Tr> <Td> Yakima County </Td> <Td> 077 </Td> <Td> Yakima </Td> <Td> 1865 </Td> <Td> Ferguson County (defunct) </Td> <Td> The Yakama Native American tribe </Td> <Td> 7005243231000000000 ♠ 243,231 </Td> <Td> 7003429600000000000 ♠ 4,296 sq mi (7004111270000000000 ♠ 11,127 km) </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> County </Th> <Th> FIPS code </Th> <Th> County seat </Th> <Th> Established </Th> <Th> Origin </Th> <Th> Etymology </Th> <Th> Population </Th> <Th> Area </Th> <Th> Map </Th> </Tr>

What is the largest county in population in washington state