RANKING · 1990 CENSUS · 36 SHOWN OF 36

Most sparsely populated, Oregon counties · 1990

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, OROR7,3801−7%

02Wheeler County, OROR1,4721−10%

03Lake County, OROR8,1871−3%

04Gilliam County, OROR1,9711−10%

05Grant County, OROR7,0752−1%

06Wallowa County, OROR7,5952−4%

07Sherman County, OROR2,0512−1%

08Malheur County, OROR32,2613−18%

09Morrow County, OROR12,6024−31%

10Crook County, OROR27,5645−26%

11Baker County, OROR16,6585−9%

12Jefferson County, OROR25,7408−28%

13Wasco County, OROR26,3109−9%

14Klamath County, OROR70,27410−10%

15Union County, OROR25,90012−4%

16Curry County, OROR22,62112−9%

17Umatilla County, OROR81,11918−16%

18Douglas County, OROR111,95119−6%

19Tillamook County, OROR27,38420−11%

20Deschutes County, OROR213,07225−35%

21Hood River County, OROR23,72032−17%

22Coos County, OROR63,99238−4%

23Josephine County, OROR87,86738−17%

24Lincoln County, OROR50,63640−13%

25Linn County, OROR132,84340−11%

26Clatsop County, OROR40,92640−7%

27Jackson County, OROR221,79553−19%

28Columbia County, OROR54,09157−14%

29Lane County, OROR381,58462−12%

30Polk County, OROR90,03767−21%

31Yamhill County, OROR110,02492−23%

32Benton County, OROR97,728105−9%

33Clackamas County, OROR426,280149−18%

34Marion County, OROR355,777193−20%

35Washington County, OROR611,708430−30%

36Multnomah County, OROR795,3911,355−12%

SHOWING 1–36 OF 36

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