Data / Rankings / Population / Counties in Oregon

Counties in Oregon by population

Multnomah County had the highest population of 36 counties in 2020, at 816,261. Wheeler County had the lowest, at 1,460. The median was 45,833 and the figure for Oregon was 4.24 million. Source: the U.S. Census Bureau.

Highest816,261Multnomah County
Lowest1,460Wheeler County
Median45,83336 counties
Oregon4,243,544History

All counties, 2020

CSVChart (SVG)

Multnomah CountyMultnomah County: 816,261 persons816,261Washington CountyWashington County: 601,004 persons601,004Clackamas CountyClackamas County: 422,483 persons422,483Lane CountyLane County: 384,242 persons384,242Marion CountyMarion County: 346,284 persons346,284Jackson CountyJackson County: 223,753 persons223,753Deschutes CountyDeschutes County: 199,461 persons199,461Linn CountyLinn County: 128,950 persons128,950Douglas CountyDouglas County: 111,294 persons111,294Yamhill CountyYamhill County: 107,692 persons107,692Benton CountyBenton County: 93,602 persons93,602Josephine CountyJosephine County: 88,214 persons88,214Polk CountyPolk County: 87,983 persons87,983Umatilla CountyUmatilla County: 79,892 persons79,892Klamath CountyKlamath County: 69,624 persons69,624Coos CountyCoos County: 64,982 persons64,982Columbia CountyColumbia County: 52,715 persons52,715Lincoln CountyLincoln County: 50,509 persons50,509Clatsop CountyClatsop County: 41,156 persons41,156Malheur CountyMalheur County: 31,650 persons31,650Tillamook CountyTillamook County: 27,456 persons27,456Wasco CountyWasco County: 26,613 persons26,613Union CountyUnion County: 26,171 persons26,171Crook CountyCrook County: 24,933 persons24,933Jefferson CountyJefferson County: 24,582 persons24,582Hood River CountyHood River County: 23,898 persons23,898Curry CountyCurry County: 23,519 persons23,519Baker CountyBaker County: 16,728 persons16,728Morrow CountyMorrow County: 12,219 persons12,219Lake CountyLake County: 8,170 persons8,170Harney CountyHarney County: 7,507 persons7,507Wallowa CountyWallowa County: 7,403 persons7,403Grant CountyGrant County: 7,240 persons7,240Gilliam CountyGilliam County: 2,014 persons2,014Sherman CountySherman County: 1,880 persons1,880Wheeler CountyWheeler County: 1,460 persons1,460
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2020
persons
1Multnomah County816,261
2Washington County601,004
3Clackamas County422,483
4Lane County384,242
5Marion County346,284
6Jackson County223,753
7Deschutes County199,461
8Linn County128,950
9Douglas County111,294
10Yamhill County107,692
11Benton County93,602
12Josephine County88,214
13Polk County87,983
14Umatilla County79,892
15Klamath County69,624
16Coos County64,982
17Columbia County52,715
18Lincoln County50,509
19Clatsop County41,156
20Malheur County31,650
21Tillamook County27,456
22Wasco County26,613
23Union County26,171
24Crook County24,933
25Jefferson County24,582
26Hood River County23,898
27Curry County23,519
28Baker County16,728
29Morrow County12,219
30Lake County8,170
31Harney County7,507
32Wallowa County7,403
33Grant County7,240
34Gilliam County2,014
35Sherman County1,880
36Wheeler County1,460

Other periods

About this ranking

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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Questions

Which county has the highest population?

Multnomah County, with 816,261 in 2020, according to the U.S. Census Bureau.

Which county has the lowest population?

Wheeler County, with 1,460 in 2020.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved 2026-10-08.

Population: other rankings

Counties in Oregon: more rankings