RANKING · 2025 ACS · 36 SHOWN OF 36

Most sparsely populated, Oregon counties

Oregon counties with the fewest 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 densely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Harney County, OROR7,3801−3%

02Wheeler County, OROR1,4721−5%

03Lake County, OROR8,1871+10%

04Grant County, OROR7,0752−11%

05Gilliam County, OROR1,9712+3%

06Wallowa County, OROR7,5952+5%

07Sherman County, OROR2,0512+6%

08Malheur County, OROR32,2613+2%

09Baker County, OROR16,6585−0%

10Morrow County, OROR12,6026+15%

11Crook County, OROR27,5649+44%

12Wasco County, OROR26,31011+11%

13Klamath County, OROR70,27412+10%

14Union County, OROR25,90013+6%

15Curry County, OROR22,62114+7%

16Jefferson County, OROR25,74014+35%

17Douglas County, OROR111,95122+12%

18Tillamook County, OROR27,38425+13%

19Umatilla County, OROR81,11925+15%

20Coos County, OROR63,99240+2%

21Hood River County, OROR23,72045+16%

22Clatsop County, OROR40,92649+15%

23Lincoln County, OROR50,63652+14%

24Josephine County, OROR87,86754+16%

25Linn County, OROR132,84358+29%

26Deschutes County, OROR213,07271+85%

27Jackson County, OROR221,79580+22%

28Columbia County, OROR54,09182+24%

29Lane County, OROR381,58484+18%

30Polk County, OROR90,037122+44%

31Benton County, OROR97,728145+25%

32Yamhill County, OROR110,024154+29%

33Clackamas County, OROR426,280228+26%

34Marion County, OROR355,777301+25%

35Washington County, OROR611,708845+37%

36Multnomah County, OROR795,3911,845+20%

SHOWING 1–36 OF 36

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