RANKING · 2020 CENSUS · 36 SHOWN OF 36

Most population gained, Oregon counties · 2020

Oregon counties that added the most residents from the 2010 census to 2020, by raw count of people rather than percentage. This list covers the 36 counties in Oregon that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Multnomah County, OROR795,391+80,094+5%

02Washington County, OROR611,708+70,662−47%

03Clackamas County, OROR426,280+45,409−24%

04Deschutes County, OROR213,072+40,520+0%

05Lane County, OROR381,584+31,256−22%

06Marion County, OROR355,777+30,585−46%

07Jackson County, OROR221,795+20,053−43%

08Polk County, OROR90,037+12,030−6%

09Linn County, OROR132,843+11,938+1%

10Benton County, OROR97,728+9,605+31%

11Yamhill County, OROR110,024+8,529−56%

12Josephine County, OROR87,867+5,377−59%

13Lincoln County, OROR50,636+4,361−22%

14Umatilla County, OROR81,119+4,186−63%

15Clatsop County, OROR40,926+4,033+73%

16Crook County, OROR27,564+3,760−26%

17Douglas County, OROR111,951+3,534−39%

18Columbia County, OROR54,091+3,238−46%

19Klamath County, OROR70,274+3,033−50%

20Jefferson County, OROR25,740+2,782−48%

21Tillamook County, OROR27,384+2,140−21%

22Coos County, OROR63,992+1,886−25%

23Hood River County, OROR23,720+1,631−54%

24Wasco County, OROR26,310+1,457−31%

25Curry County, OROR22,621+1,082−40%

26Morrow County, OROR12,602+1,013−70%

27Baker County, OROR16,658+534−63%

28Union County, OROR25,900+448−52%

29Wallowa County, OROR7,595+383+22%

30Lake County, OROR8,187+265+12%

31Malheur County, OROR32,261+258−95%

32Gilliam County, OROR1,971+124−37%

33Sherman County, OROR2,051+105+556%

34Harney County, OROR7,380+73−87%

35Wheeler County, OROR1,472+10−93%

36Grant County, OROR7,075-212−359%

SHOWING 1–36 OF 36

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS