RANKING · 2000 CENSUS · 36 SHOWN OF 36

Most densely populated, Oregon counties · 2000

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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YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Multnomah County, OROR795,3911,532+0%

02Washington County, OROR611,708615+0%

03Marion County, OROR355,777241+0%

04Clackamas County, OROR426,280181+0%

05Yamhill County, OROR110,024119+0%

06Benton County, OROR97,728116+0%

07Polk County, OROR90,03784+0%

08Lane County, OROR381,58471+0%

09Columbia County, OROR54,09166+0%

10Jackson County, OROR221,79565+0%

11Josephine County, OROR87,86746+0%

12Lincoln County, OROR50,63645+0%

13Linn County, OROR132,84345+0%

14Clatsop County, OROR40,92643+0%

15Coos County, OROR63,99239+0%

16Hood River County, OROR23,72039+0%

17Deschutes County, OROR213,07238+0%

18Tillamook County, OROR27,38422+0%

19Umatilla County, OROR81,11922+0%

20Douglas County, OROR111,95120+0%

21Curry County, OROR22,62113+0%

22Union County, OROR25,90012+0%

23Klamath County, OROR70,27411+0%

24Jefferson County, OROR25,74011+0%

25Wasco County, OROR26,31010+0%

26Crook County, OROR27,5646+0%

27Baker County, OROR16,6585+0%

28Morrow County, OROR12,6025+0%

29Malheur County, OROR32,2613+0%

30Sherman County, OROR2,0512+0%

31Wallowa County, OROR7,5952+0%

32Grant County, OROR7,0752+0%

33Gilliam County, OROR1,9712+0%

34Lake County, OROR8,1871+0%

35Wheeler County, OROR1,4721+0%

36Harney County, OROR7,3801+0%

SHOWING 1–36 OF 36

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