Data / Rankings / Population / Counties in Oregon

Counties in Oregon by population, 2025

Multnomah County had the highest population of 36 counties in 2025, at 795,391. Wheeler County had the lowest, at 1,472. The median was 45,781 and the figure for Oregon was 4.27 million. Source: the U.S. Census Bureau.

Highest795,391Multnomah County
Lowest1,472Wheeler County
Median45,78136 counties
Oregon4,273,586History

All counties, 2025

CSVChart (SVG)

Multnomah CountyMultnomah County: 795,391 persons795,391Washington CountyWashington County: 611,708 persons611,708Clackamas CountyClackamas County: 426,280 persons426,280Lane CountyLane County: 381,584 persons381,584Marion CountyMarion County: 355,777 persons355,777Jackson CountyJackson County: 221,795 persons221,795Deschutes CountyDeschutes County: 213,072 persons213,072Linn CountyLinn County: 132,843 persons132,843Douglas CountyDouglas County: 111,951 persons111,951Yamhill CountyYamhill County: 110,024 persons110,024Benton CountyBenton County: 97,728 persons97,728Polk CountyPolk County: 90,037 persons90,037Josephine CountyJosephine County: 87,867 persons87,867Umatilla CountyUmatilla County: 81,119 persons81,119Klamath CountyKlamath County: 70,274 persons70,274Coos CountyCoos County: 63,992 persons63,992Columbia CountyColumbia County: 54,091 persons54,091Lincoln CountyLincoln County: 50,636 persons50,636Clatsop CountyClatsop County: 40,926 persons40,926Malheur CountyMalheur County: 32,261 persons32,261Crook CountyCrook County: 27,564 persons27,564Tillamook CountyTillamook County: 27,384 persons27,384Wasco CountyWasco County: 26,310 persons26,310Union CountyUnion County: 25,900 persons25,900Jefferson CountyJefferson County: 25,740 persons25,740Hood River CountyHood River County: 23,720 persons23,720Curry CountyCurry County: 22,621 persons22,621Baker CountyBaker County: 16,658 persons16,658Morrow CountyMorrow County: 12,602 persons12,602Lake CountyLake County: 8,187 persons8,187Wallowa CountyWallowa County: 7,595 persons7,595Harney CountyHarney County: 7,380 persons7,380Grant CountyGrant County: 7,075 persons7,075Sherman CountySherman County: 2,051 persons2,051Gilliam CountyGilliam County: 1,971 persons1,971Wheeler CountyWheeler County: 1,472 persons1,472
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2025
persons		Change on 2024
1Multnomah County795,391+0.1%
2Washington County611,708+0.5%
3Clackamas County426,280+0.2%
4Lane County381,584-0.1%
5Marion County355,777+0.7%
6Jackson County221,795+0.2%
7Deschutes County213,072+0.9%
8Linn County132,843+0.2%
9Douglas County111,951-0.4%
10Yamhill County110,024-0%
11Benton County97,728+0.1%
12Polk County90,037-0.2%
13Josephine County87,867-0.3%
14Umatilla County81,119+0.2%
15Klamath County70,274-0.1%
16Coos County63,992-0.4%
17Columbia County54,091+0.2%
18Lincoln County50,636-0.2%
19Clatsop County40,926-0.7%
20Malheur County32,261-0.3%
21Crook County27,564+0.9%
22Tillamook County27,384-0.1%
23Wasco County26,310-0.6%
24Union County25,900-0.2%
25Jefferson County25,740+0.2%
26Hood River County23,720-0.1%
27Curry County22,621-0.9%
28Baker County16,658-0.6%
29Morrow County12,602+1.2%
30Lake County8,187+0.2%
31Wallowa County7,595-0%
32Harney County7,380-0.6%
33Grant County7,075-0.4%
34Sherman County2,051+1.8%
35Gilliam County1,971-0.7%
36Wheeler County1,472+1.2%

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 795,391 in 2025, according to the U.S. Census Bureau.

Which county has the lowest population?

Wheeler County, with 1,472 in 2025.

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