RANKING · 2025 ESTIMATES · 36 SHOWN OF 36

Largest by population, Oregon counties

The most populous Oregon counties as of the 2025 population estimates. This list covers the 36 counties in Oregon that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 2000

01Multnomah County, OROR795,391+20%

02Washington County, OROR611,708+37%

03Clackamas County, OROR426,280+26%

04Lane County, OROR381,584+18%

05Marion County, OROR355,777+25%

06Jackson County, OROR221,795+22%

07Deschutes County, OROR213,072+85%

08Linn County, OROR132,843+29%

09Douglas County, OROR111,951+12%

10Yamhill County, OROR110,024+29%

11Benton County, OROR97,728+25%

12Polk County, OROR90,037+44%

13Josephine County, OROR87,867+16%

14Umatilla County, OROR81,119+15%

15Klamath County, OROR70,274+10%

16Coos County, OROR63,992+2%

17Columbia County, OROR54,091+24%

18Lincoln County, OROR50,636+14%

19Clatsop County, OROR40,926+15%

20Malheur County, OROR32,261+2%

21Crook County, OROR27,564+44%

22Tillamook County, OROR27,384+13%

23Wasco County, OROR26,310+11%

24Union County, OROR25,900+6%

25Jefferson County, OROR25,740+35%

26Hood River County, OROR23,720+16%

27Curry County, OROR22,621+7%

28Baker County, OROR16,658−0%

29Morrow County, OROR12,602+15%

30Lake County, OROR8,187+10%

31Wallowa County, OROR7,595+5%

32Harney County, OROR7,380−3%

33Grant County, OROR7,075−11%

34Sherman County, OROR2,051+6%

35Gilliam County, OROR1,971+3%

36Wheeler County, OROR1,472−5%

SHOWING 1–36 OF 36

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES