RANKING · 2020 CENSUS · 36 SHOWN OF 36

Most population lost, Oregon counties · 2020

Oregon counties that lost 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

01Grant County, OROR7,075-212−359%

02Wheeler County, OROR1,472+10−93%

03Harney County, OROR7,380+73−87%

04Sherman County, OROR2,051+105+556%

05Gilliam County, OROR1,971+124−37%

06Malheur County, OROR32,261+258−95%

07Lake County, OROR8,187+265+12%

08Wallowa County, OROR7,595+383+22%

09Union County, OROR25,900+448−52%

10Baker County, OROR16,658+534−63%

11Morrow County, OROR12,602+1,013−70%

12Curry County, OROR22,621+1,082−40%

13Wasco County, OROR26,310+1,457−31%

14Hood River County, OROR23,720+1,631−54%

15Coos County, OROR63,992+1,886−25%

16Tillamook County, OROR27,384+2,140−21%

17Jefferson County, OROR25,740+2,782−48%

18Klamath County, OROR70,274+3,033−50%

19Columbia County, OROR54,091+3,238−46%

20Douglas County, OROR111,951+3,534−39%

21Crook County, OROR27,564+3,760−26%

22Clatsop County, OROR40,926+4,033+73%

23Umatilla County, OROR81,119+4,186−63%

24Lincoln County, OROR50,636+4,361−22%

25Josephine County, OROR87,867+5,377−59%

26Yamhill County, OROR110,024+8,529−56%

27Benton County, OROR97,728+9,605+31%

28Linn County, OROR132,843+11,938+1%

29Polk County, OROR90,037+12,030−6%

30Jackson County, OROR221,795+20,053−43%

31Marion County, OROR355,777+30,585−46%

32Lane County, OROR381,584+31,256−22%

33Deschutes County, OROR213,072+40,520+0%

34Clackamas County, OROR426,280+45,409−24%

35Washington County, OROR611,708+70,662−47%

36Multnomah County, OROR795,391+80,094+5%

SHOWING 1–36 OF 36

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