This is less than a one percent fall in King County’s population, from 2,272,571 in 2020 to 2,252,305 in 2021.
King County had the largest population in Washington in 2021.
The US Census Bureau found more than 73 percent of counties in the US saw a natural decrease in population in 2021. This is up from a 55.5 percent increase in 2020.
The Midwest suffered the most sustained population decreases, with many counties along the US East Coast and through the Rocky Mountains seeing increases.
The US population continues to grow, though at a slower rate than before.
Washington Counties By Population Change from 2020 to 2021
| County | 2020 Estimated Population | 2021 Estimated Population | % Change in Population From Year to Year |
|---|---|---|---|
| San Juan County | 17,818 | 18,557 | 4.1% |
| Wahkiakum County | 4,443 | 4,582 | 3.1% |
| Pend Oreille County | 13,482 | 13,886 | 3% |
| Lincoln County | 10,920 | 11,232 | 2.9% |
| Mason County | 66,028 | 67,615 | 2.4% |
| Garfield County | 2,292 | 2,346 | 2.4% |
| Columbia County | 3,949 | 4,042 | 2.4% |
| Lewis County | 82,474 | 84,398 | 2.3% |
| Kittitas County | 44,589 | 45,499 | 2% |
| Pacific County | 23,470 | 23,948 | 2% |
| Stevens County | 46,566 | 47,426 | 1.8% |
| Jefferson County | 33,048 | 33,605 | 1.7% |
| Douglas County | 42,998 | 43,696 | 1.6% |
| Klickitat County | 22,783 | 23,118 | 1.5% |
| Grays Harbor County | 75,811 | 76,841 | 1.4% |
| Benton County | 207,230 | 210,025 | 1.3% |
| Ferry County | 7,178 | 7,273 | 1.3% |
| Clark County | 505,013 | 511,404 | 1.3% |
| Franklin County | 97,076 | 98,268 | 1.2% |
| Okanogan County | 42,118 | 42,634 | 1.2% |
| Clallam County | 77,280 | 78,209 | 1.2% |
| Skamania County | 12,034 | 12,170 | 1.1% |
| Spokane County | 540,700 | 546,040 | 1% |
| Grant County | 99,365 | 100,297 | 0.9% |
| Thurston County | 295,729 | 297,977 | 0.8% |
| Whatcom County | 227,304 | 228,831 | 0.7% |
| Skagit County | 129,852 | 130,696 | 0.6% |
| Chelan County | 79,185 | 79,646 | 0.6% |
| Island County | 86,948 | 87,432 | 0.6% |
| Cowlitz County | 110,924 | 111,524 | 0.5% |
| Snohomish County | 829,331 | 833,540 | 0.5% |
| Asotin County | 22,290 | 22,397 | 0.5% |
| Pierce County | 922,828 | 925,708 | 0.3% |
| Whitman County | 47,786 | 47,873 | 0.2% |
| Walla Walla County | 62,574 | 62,682 | 0.2% |
| Adams County | 20,605 | 20,621 | 0.1% |
| Yakima County | 256,533 | 256,035 | -0.2% |
| Kitsap County | 275,660 | 274,314 | -0.5% |
| King County | 2,272,571 | 2,252,305 | -0.9% |
ORGANIZATIONS IN THIS STORY
Eastgate• City of Issaquah• City of Mercer Island• Boulevard Park• Hobart• Ravensdale• Riverbend• Vashon• Lake Marcel-Stillwater• City of Clyde Hill• City of Kent• City of Carnation• Baring• Mirrormont• City of Seatac• City of Snoqualmie• City of Woodinville• Wilderness Rim• City of Kirkland• City of Algona• Cottage Lake• City of Black Diamond• City of Renton• Inglewood-Finn Hill• City of Duvall• Bryn Mawr-Skyway• City of Sammamish• Beaux Arts Village• City of North Bend• City of Kenmore• Klahanie• Town of Yarrow Point• Fall City• City of Redmond• City of Lake Forest Park• East Hill-Meridian• City of Normandy Park• East Renton Highlands• Shadow Lake• City of Burien• Town of Skykomish• Lakeland South• City of Federal Way• Union Hill-Novelty Hill• City of Newcastle• Lakeland North• City of Medina• Riverton• City of Bellevue• Lake Holm• City of Shoreline• City of Maple Valley• White Center• City of Tukwila• Town of Hunts Point• City of Covington• City Of Seattle• Maple Heights-Lake Desire• City Of Des Moines• Ames Lake• Lake Morton-Berrydale• Kingsgate• Tanner
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