Fastest-growing counties in Washington

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September 23, 2021
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Fastest-growing counties in Washington

From 2019 to 2020, the U.S. population grew by .35%, its slowest rate since 1900. Declining births, increasing deaths largely due to the graying Baby Boomer population, and a crackdown on immigration have contributed to many states seeing net population losses in recent years.

But in other pockets of the country, populations are growing. These shifts can be due to job opportunities, high quality of life, easy commutability to job centers, low rents, or any combination of these or other factors. Stacker compiled a list of the fastest-growing counties in Washington using data from the U.S. Census Bureau. Counties are ranked by the highest population growth from 2010 to 2020.

A county typically sees population growth as a “bedroom community” (a municipality with an atypically large commuting population) to a large city. These communities are typically quieter than their feeder cities, offer lower rents and a higher quality of living, and are remote enough to be immune to the feeder city’s crime, traffic, and crowds. Keep reading to see if your home county made the list.

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Kevmi // Wikimedia Commons

#39. Ferry County

- 2010 to 2020 population change: -326
--- #1,963 among all counties nationwide
- 2010 to 2020 percent population change: -4.3%
--- #39 among counties in Washington, #2,206 among all counties nationwide
- 2020 population: 7,178
--- #36 largest county in Washington, #2,646 largest county nationwide
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John Stanton // Wikimedia Commons

#38. Columbia County

- 2010 to 2020 population change: -5
--- #1,570 among all counties nationwide
- 2010 to 2020 percent population change: -0.1%
--- #38 among counties in Washington, #1,583 among all counties nationwide
- 2020 population: 3,952
--- #38 largest county in Washington, #2,894 largest county nationwide
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Calvin Beale // Wikimedia Commons

#37. Garfield County

- 2010 to 2020 population change: 46
--- #1,506 among all counties nationwide
- 2010 to 2020 percent population change: +2.1%
--- #37 among counties in Washington, #1,287 among all counties nationwide
- 2020 population: 2,286
--- #39 largest county in Washington, #3,020 largest county nationwide
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Publichall // Wikimedia Commons

#36. Lincoln County

- 2010 to 2020 population change: 343
--- #1,307 among all counties nationwide
- 2010 to 2020 percent population change: +3.3%
--- #36 among counties in Washington, #1,113 among all counties nationwide
- 2020 population: 10,876
--- #35 largest county in Washington, #2,352 largest county nationwide
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Walter Siegmund // Wikimedia Commons

#35. Wahkiakum County

- 2010 to 2020 population change: 440
--- #1,260 among all counties nationwide
- 2010 to 2020 percent population change: +11.0%
--- #20 among counties in Washington, #494 among all counties nationwide
- 2020 population: 4,422
--- #37 largest county in Washington, #2,862 largest county nationwide
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Ruthven78 // Wikimedia Commons

#34. Pend Oreille County

- 2010 to 2020 population change: 497
--- #1,238 among all counties nationwide
- 2010 to 2020 percent population change: +3.9%
--- #35 among counties in Washington, #1,050 among all counties nationwide
- 2020 population: 13,401
--- #33 largest county in Washington, #2,188 largest county nationwide
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Williamborg // Wikimedia Commons

#33. Asotin County

- 2010 to 2020 population change: 922
--- #1,098 among all counties nationwide
- 2010 to 2020 percent population change: +4.3%
--- #34 among counties in Washington, #995 among all counties nationwide
- 2020 population: 22,285
--- #30 largest county in Washington, #1,701 largest county nationwide
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U.S. Geological Survey // Wikimedia Commons

#32. Skamania County

- 2010 to 2020 population change: 1,167
--- #1,045 among all counties nationwide
- 2010 to 2020 percent population change: +10.7%
--- #22 among counties in Washington, #514 among all counties nationwide
- 2020 population: 12,036
--- #34 largest county in Washington, #2,277 largest county nationwide
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Bouldernavigator // Wikimedia Commons

#31. Okanogan County

- 2010 to 2020 population change: 1,866
--- #926 among all counties nationwide
- 2010 to 2020 percent population change: +4.6%
--- #33 among counties in Washington, #972 among all counties nationwide
- 2020 population: 42,104
--- #26 largest county in Washington, #1,141 largest county nationwide
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Sam Beebe // Wikimedia Commons

#30. Pacific County

- 2010 to 2020 population change: 2,173
--- #873 among all counties nationwide
- 2010 to 2020 percent population change: +10.3%
--- #24 among counties in Washington, #543 among all counties nationwide
- 2020 population: 23,365
--- #28 largest county in Washington, #1,666 largest county nationwide
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Jelson25 // Wikimedia Commons

#29. San Juan County

- 2010 to 2020 population change: 2,237
--- #862 among all counties nationwide
- 2010 to 2020 percent population change: +14.4%
--- #13 among counties in Washington, #339 among all counties nationwide
- 2020 population: 17,788
--- #32 largest county in Washington, #1,931 largest county nationwide
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MagicalT // Wikimedia Commons

#28. Klickitat County

- 2010 to 2020 population change: 2,680
--- #802 among all counties nationwide
- 2010 to 2020 percent population change: +13.4%
--- #14 among counties in Washington, #373 among all counties nationwide
- 2020 population: 22,735
--- #29 largest county in Washington, #1,687 largest county nationwide
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Joe Mabel // Wikimedia Commons

#27. Adams County

- 2010 to 2020 population change: 2,729
--- #798 among all counties nationwide
- 2010 to 2020 percent population change: +15.3%
--- #12 among counties in Washington, #299 among all counties nationwide
- 2020 population: 20,613
--- #31 largest county in Washington, #1,780 largest county nationwide
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BrandonHansen18 // Wikimedia Commons

#26. Stevens County

- 2010 to 2020 population change: 3,274
--- #742 among all counties nationwide
- 2010 to 2020 percent population change: +7.6%
--- #31 among counties in Washington, #725 among all counties nationwide
- 2020 population: 46,445
--- #23 largest county in Washington, #1,044 largest county nationwide
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Adbar // Wikimedia Commons

#25. Jefferson County

- 2010 to 2020 population change: 3,403
--- #735 among all counties nationwide
- 2010 to 2020 percent population change: +11.5%
--- #16 among counties in Washington, #467 among all counties nationwide
- 2020 population: 32,977
--- #27 largest county in Washington, #1,363 largest county nationwide
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Joe Mabel // Wikimedia Commons

#24. Grays Harbor County

- 2010 to 2020 population change: 3,544
--- #724 among all counties nationwide
- 2010 to 2020 percent population change: +4.9%
--- #32 among counties in Washington, #945 among all counties nationwide
- 2020 population: 75,636
--- #19 largest county in Washington, #738 largest county nationwide
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Ilyaunfois // Wikimedia Commons

#23. Whitman County

- 2010 to 2020 population change: 4,226
--- #674 among all counties nationwide
- 2010 to 2020 percent population change: +9.7%
--- #26 among counties in Washington, #583 among all counties nationwide
- 2020 population: 47,973
--- #22 largest county in Washington, #1,023 largest county nationwide
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MrX // Wikimedia Commons

#22. Kittitas County

- 2010 to 2020 population change: 4,468
--- #659 among all counties nationwide
- 2010 to 2020 percent population change: +11.2%
--- #19 among counties in Washington, #483 among all counties nationwide
- 2020 population: 44,337
--- #24 largest county in Washington, #1,087 largest county nationwide
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Squarestate7 // Wikicommons

#21. Walla Walla County

- 2010 to 2020 population change: 4,999
--- #626 among all counties nationwide
- 2010 to 2020 percent population change: +8.7%
--- #29 among counties in Washington, #639 among all counties nationwide
- 2020 population: 62,584
--- #21 largest county in Washington, #852 largest county nationwide
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Thayne Tuason // Wikimedia Commons

#20. Douglas County

- 2010 to 2020 population change: 5,778
--- #593 among all counties nationwide
- 2010 to 2020 percent population change: +15.5%
--- #11 among counties in Washington, #293 among all counties nationwide
- 2020 population: 42,938
--- #25 largest county in Washington, #1,119 largest county nationwide
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Ian Poellet // Wikimedia Commons

#19. Mason County

- 2010 to 2020 population change: 6,439
--- #570 among all counties nationwide
- 2010 to 2020 percent population change: +10.9%
--- #21 among counties in Washington, #504 among all counties nationwide
- 2020 population: 65,726
--- #20 largest county in Washington, #819 largest county nationwide
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Neonstar // Wikimedia Commons

#18. Clallam County

- 2010 to 2020 population change: 6,517
--- #567 among all counties nationwide
- 2010 to 2020 percent population change: +9.2%
--- #28 among counties in Washington, #603 among all counties nationwide
- 2020 population: 77,155
--- #18 largest county in Washington, #727 largest county nationwide
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Steven Pavlov // Wikimedia Commons

#17. Lewis County

- 2010 to 2020 population change: 7,499
--- #539 among all counties nationwide
- 2010 to 2020 percent population change: +10.0%
--- #25 among counties in Washington, #555 among all counties nationwide
- 2020 population: 82,149
--- #16 largest county in Washington, #698 largest county nationwide
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Jennifer Gottwald // Wikicommons

#16. Chelan County

- 2010 to 2020 population change: 8,079
--- #524 among all counties nationwide
- 2010 to 2020 percent population change: +11.4%
--- #18 among counties in Washington, #475 among all counties nationwide
- 2020 population: 79,074
--- #17 largest county in Washington, #718 largest county nationwide
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Joe Mabel // Wikimedia Commons

#15. Island County

- 2010 to 2020 population change: 8,224
--- #519 among all counties nationwide
- 2010 to 2020 percent population change: +10.5%
--- #23 among counties in Washington, #531 among all counties nationwide
- 2020 population: 86,857
--- #15 largest county in Washington, #670 largest county nationwide
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Sam Beebe // Wikimedia Commons

#14. Cowlitz County

- 2010 to 2020 population change: 9,486
--- #493 among all counties nationwide
- 2010 to 2020 percent population change: +9.4%
--- #27 among counties in Washington, #593 among all counties nationwide
- 2020 population: 110,730
--- #12 largest county in Washington, #553 largest county nationwide
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Irra // Shutterstock

#13. Grant County

- 2010 to 2020 population change: 13,981
--- #396 among all counties nationwide
- 2010 to 2020 percent population change: +16.4%
--- #9 among counties in Washington, #270 among all counties nationwide
- 2020 population: 99,123
--- #13 largest county in Washington, #613 largest county nationwide
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Joe Mabel // Wikicommons

#12. Skagit County

- 2010 to 2020 population change: 14,292
--- #388 among all counties nationwide
- 2010 to 2020 percent population change: +12.4%
--- #15 among counties in Washington, #422 among all counties nationwide
- 2020 population: 129,523
--- #11 largest county in Washington, #498 largest county nationwide
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Michael S. Shannon // Wikimedia Commons

#11. Yakima County

- 2010 to 2020 population change: 20,186
--- #329 among all counties nationwide
- 2010 to 2020 percent population change: +8.5%
--- #30 among counties in Washington, #648 among all counties nationwide
- 2020 population: 256,728
--- #8 largest county in Washington, #274 largest county nationwide
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Williamborg // Wikimedia Commons

#10. Franklin County

- 2010 to 2020 population change: 25,420
--- #279 among all counties nationwide
- 2010 to 2020 percent population change: +35.6%
--- #1 among counties in Washington, #44 among all counties nationwide
- 2020 population: 96,749
--- #14 largest county in Washington, #627 largest county nationwide
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Dcoetzee // Wikimedia Commons

#9. Kitsap County

- 2010 to 2020 population change: 28,275
--- #258 among all counties nationwide
- 2010 to 2020 percent population change: +11.4%
--- #17 among counties in Washington, #474 among all counties nationwide
- 2020 population: 275,611
--- #7 largest county in Washington, #252 largest county nationwide
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Nick Kelly / Faithlife Corporation

#8. Whatcom County

- 2010 to 2020 population change: 30,854
--- #244 among all counties nationwide
- 2010 to 2020 percent population change: +15.7%
--- #10 among counties in Washington, #286 among all counties nationwide
- 2020 population: 226,847
--- #9 largest county in Washington, #306 largest county nationwide
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formulanone // Wikimedia Commons

#7. Benton County

- 2010 to 2020 population change: 39,796
--- #189 among all counties nationwide
- 2010 to 2020 percent population change: +23.8%
--- #2 among counties in Washington, #127 among all counties nationwide
- 2020 population: 206,873
--- #10 largest county in Washington, #331 largest county nationwide
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Joe Mabel // Wikicommons

#6. Thurston County

- 2010 to 2020 population change: 51,230
--- #147 among all counties nationwide
- 2010 to 2020 percent population change: +21.0%
--- #4 among counties in Washington, #163 among all counties nationwide
- 2020 population: 294,793
--- #6 largest county in Washington, #240 largest county nationwide
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Ron Reiring // Wikicommons

#5. Spokane County

- 2010 to 2020 population change: 78,077
--- #97 among all counties nationwide
- 2010 to 2020 percent population change: +16.9%
--- #8 among counties in Washington, #258 among all counties nationwide
- 2020 population: 539,339
--- #4 largest county in Washington, #131 largest county nationwide
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Steve Morgan // Wikimedia Commons

#4. Clark County

- 2010 to 2020 population change: 88,495
--- #80 among all counties nationwide
- 2010 to 2020 percent population change: +21.3%
--- #3 among counties in Washington, #160 among all counties nationwide
- 2020 population: 503,311
--- #5 largest county in Washington, #142 largest county nationwide
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SounderBruce // Wikimedia Commons

#3. Snohomish County

- 2010 to 2020 population change: 133,738
--- #45 among all counties nationwide
- 2010 to 2020 percent population change: +19.3%
--- #6 among counties in Washington, #206 among all counties nationwide
- 2020 population: 827,957
--- #3 largest county in Washington, #77 largest county nationwide
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SounderBruce // Wikimedia Commons

#2. Pierce County

- 2010 to 2020 population change: 138,449
--- #41 among all counties nationwide
- 2010 to 2020 percent population change: +17.7%
--- #7 among counties in Washington, #240 among all counties nationwide
- 2020 population: 921,130
--- #2 largest county in Washington, #61 largest county nationwide
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kan_khampanya // Shutterstock

#1. King County

- 2010 to 2020 population change: 390,486
--- #3 among all counties nationwide
- 2010 to 2020 percent population change: +20.8%
--- #5 among counties in Washington, #170 among all counties nationwide
- 2020 population: 2,269,675
--- #1 largest county in Washington, #12 largest county nationwide

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