| Washington Population by County |
| year 2000 |
| Washington Population by County |
| year 2000 |
| Area | Population |
|---|---|
| King County | 1,737,034 |
| Pierce County | 700,820 |
| Snohomish County | 606,024 |
| Spokane County | 417,939 |
| Clark County | 345,238 |
| Kitsap County | 231,969 |
| Yakima County | 222,581 |
| Thurston County | 207,355 |
| Whatcom County | 166,814 |
| Benton County | 142,475 |
| Skagit County | 102,979 |
| Cowlitz County | 92,948 |
| Grant County | 74,698 |
| Island County | 71,558 |
| Lewis County | 68,600 |
| Grays Harbor County | 67,194 |
| Chelan County | 66,616 |
| Clallam County | 64,525 |
| Walla Walla County | 55,180 |
| Mason County | 49,405 |
| Franklin County | 49,347 |
| Whitman County | 40,740 |
| Stevens County | 40,066 |
| Okanogan County | 39,564 |
| Kittitas County | 33,362 |
| Douglas County | 32,603 |
| Jefferson County | 25,953 |
| Pacific County | 20,984 |
| Asotin County | 20,551 |
| Klickitat County | 19,161 |
| Adams County | 16,428 |
| San Juan County | 14,077 |
| Pend Oreille County | 11,732 |
| Lincoln County | 10,184 |
| Skamania County | 9,872 |
| Ferry County | 7,260 |
| Columbia County | 4,064 |
| Wahkiakum County | 3,824 |
| Garfield County | 2,397 |