RANKING · 2000 CENSUS · 36 SHOWN OF 36

Most densely populated, Oregon counties · 2000

Oregon counties ranked by residents per square mile (2000). This list covers the 36 counties in Oregon that qualify, ranked against each other statewide. The median across all 36 is 22.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most population gained Most population lost Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 1990

01Multnomah County, OROR795,3911,532+13%

02Washington County, OROR611,708615+43%

03Marion County, OROR355,777241+25%

04Clackamas County, OROR426,280181+21%

05Yamhill County, OROR110,024119+30%

06Benton County, OROR97,728116+10%

07Polk County, OROR90,03784+26%

08Lane County, OROR381,58471+14%

09Columbia County, OROR54,09166+16%

10Jackson County, OROR221,79565+24%

11Josephine County, OROR87,86746+21%

12Lincoln County, OROR50,63645+14%

13Linn County, OROR132,84345+13%

14Clatsop County, OROR40,92643+7%

15Coos County, OROR63,99239+4%

16Hood River County, OROR23,72039+21%

17Deschutes County, OROR213,07238+54%

18Tillamook County, OROR27,38422+12%

19Umatilla County, OROR81,11922+19%

20Douglas County, OROR111,95120+6%

21Curry County, OROR22,62113+9%

22Union County, OROR25,90012+4%

23Klamath County, OROR70,27411+11%

24Jefferson County, OROR25,74011+39%

25Wasco County, OROR26,31010+10%

26Crook County, OROR27,5646+36%

27Baker County, OROR16,6585+9%

28Morrow County, OROR12,6025+44%

29Malheur County, OROR32,2613+21%

30Sherman County, OROR2,0512+1%

31Wallowa County, OROR7,5952+5%

32Grant County, OROR7,0752+1%

33Gilliam County, OROR1,9712+12%

34Lake County, OROR8,1871+3%

35Wheeler County, OROR1,4721+11%

36Harney County, OROR7,3801+8%

SHOWING 1–36 OF 36

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS