RANKING · 2010 CENSUS · 36 SHOWN OF 36

Most densely populated, Oregon counties · 2010

Oregon counties ranked by residents per square mile (2023). This list covers the 36 counties in Oregon that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most sparsely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Multnomah County, OROR795,3911,706+11%

02Washington County, OROR611,708731+19%

03Marion County, OROR355,777267+11%

04Clackamas County, OROR426,280201+11%

05Yamhill County, OROR110,024139+17%

06Benton County, OROR97,728127+10%

07Polk County, OROR90,037102+21%

08Lane County, OROR381,58477+9%

09Columbia County, OROR54,09175+13%

10Jackson County, OROR221,79573+12%

11Deschutes County, OROR213,07252+37%

12Linn County, OROR132,84351+13%

13Josephine County, OROR87,86750+9%

14Lincoln County, OROR50,63647+3%

15Clatsop County, OROR40,92645+4%

16Hood River County, OROR23,72043+9%

17Coos County, OROR63,99239+0%

18Umatilla County, OROR81,11924+8%

19Tillamook County, OROR27,38423+4%

20Douglas County, OROR111,95121+7%

21Curry County, OROR22,62114+6%

22Union County, OROR25,90013+5%

23Jefferson County, OROR25,74012+14%

24Klamath County, OROR70,27411+4%

25Wasco County, OROR26,31011+6%

26Crook County, OROR27,5647+9%

27Morrow County, OROR12,6026+2%

28Baker County, OROR16,6585−4%

29Malheur County, OROR32,2613−1%

30Wallowa County, OROR7,5952−3%

31Sherman County, OROR2,0512−9%

32Grant County, OROR7,0752−6%

33Gilliam County, OROR1,9712−2%

34Lake County, OROR8,1871+6%

35Wheeler County, OROR1,4721−7%

36Harney County, OROR7,3801−2%

SHOWING 1–36 OF 36

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES