RANKING · 1990 CENSUS · 36 SHOWN OF 36

Largest by population, Oregon counties · 1990

The most populous Oregon counties as of the 1990 population estimates. This list covers the 36 counties in Oregon that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS –

01Multnomah County, OROR583,887–

02Washington County, OROR311,554–

03Lane County, OROR282,912–

04Clackamas County, OROR278,850–

05Marion County, OROR228,483–

06Jackson County, OROR146,389–

07Douglas County, OROR94,649–

08Linn County, OROR91,227–

09Deschutes County, OROR74,958–

10Benton County, OROR70,811–

11Yamhill County, OROR65,551–

12Josephine County, OROR62,649–

13Coos County, OROR60,273–

14Umatilla County, OROR59,249–

15Klamath County, OROR57,702–

16Polk County, OROR49,541–

17Lincoln County, OROR38,889–

18Columbia County, OROR37,557–

19Clatsop County, OROR33,301–

20Malheur County, OROR26,038–

21Union County, OROR23,598–

22Wasco County, OROR21,683–

23Tillamook County, OROR21,570–

24Curry County, OROR19,327–

25Hood River County, OROR16,903–

26Baker County, OROR15,317–

27Crook County, OROR14,111–

28Jefferson County, OROR13,676–

29Grant County, OROR7,853–

30Morrow County, OROR7,625–

31Lake County, OROR7,186–

32Harney County, OROR7,060–

33Wallowa County, OROR6,911–

34Sherman County, OROR1,918–

35Gilliam County, OROR1,717–

36Wheeler County, OROR1,396–

SHOWING 1–36 OF 36

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS