Data / Rankings / Population density / Counties in Oregon

Counties in Oregon by population density

Multnomah County had the highest population density of 36 counties in 2023, at 711.1 inhabitants per km². Harney County had the lowest, at 0.3 inhabitants per km². The median was 9.6 inhabitants per km² and the figure for Oregon was 17.1 inhabitants per km². Source: the U.S. Census Bureau.

Highest711.1Multnomah County
Lowest0.3Harney County
Median9.636 counties
Oregon17.1History

All counties, 2023

CSVChart (SVG)

Multnomah CountyMultnomah County: 711.1 inhabitants per km²711.1Washington CountyWashington County: 321.9 inhabitants per km²321.9Marion CountyMarion County: 114.4 inhabitants per km²114.4Clackamas CountyClackamas County: 87.5 inhabitants per km²87.5Yamhill CountyYamhill County: 58.7 inhabitants per km²58.7Benton CountyBenton County: 56 inhabitants per km²56Polk CountyPolk County: 47 inhabitants per km²47Lane CountyLane County: 32.4 inhabitants per km²32.4Columbia CountyColumbia County: 31.6 inhabitants per km²31.6Jackson CountyJackson County: 30.7 inhabitants per km²30.7Deschutes CountyDeschutes County: 26.7 inhabitants per km²26.7Linn CountyLinn County: 22.2 inhabitants per km²22.2Josephine CountyJosephine County: 20.7 inhabitants per km²20.7Lincoln CountyLincoln County: 20 inhabitants per km²20Clatsop CountyClatsop County: 19.2 inhabitants per km²19.2Hood River CountyHood River County: 17.6 inhabitants per km²17.6Coos CountyCoos County: 15.6 inhabitants per km²15.6Umatilla CountyUmatilla County: 9.6 inhabitants per km²9.6Tillamook CountyTillamook County: 9.6 inhabitants per km²9.6Douglas CountyDouglas County: 8.6 inhabitants per km²8.6Jefferson CountyJefferson County: 5.5 inhabitants per km²5.5Curry CountyCurry County: 5.5 inhabitants per km²5.5Union CountyUnion County: 4.9 inhabitants per km²4.9Klamath CountyKlamath County: 4.6 inhabitants per km²4.6Wasco CountyWasco County: 4.3 inhabitants per km²4.3Crook CountyCrook County: 3.5 inhabitants per km²3.5Morrow CountyMorrow County: 2.3 inhabitants per km²2.3Baker CountyBaker County: 2.1 inhabitants per km²2.1Malheur CountyMalheur County: 1.3 inhabitants per km²1.3Wallowa CountyWallowa County: 0.9 inhabitants per km²0.9Sherman CountySherman County: 0.9 inhabitants per km²0.9Gilliam CountyGilliam County: 0.7 inhabitants per km²0.7Grant CountyGrant County: 0.6 inhabitants per km²0.6Lake CountyLake County: 0.4 inhabitants per km²0.4Wheeler CountyWheeler County: 0.3 inhabitants per km²0.3Harney CountyHarney County: 0.3 inhabitants per km²0.3
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2023
inhabitants per km²		Change on 2022
1Multnomah County711.1-0.3%
2Washington County321.9+0.6%
3Marion County114.4+0.5%
4Clackamas County87.5+0.2%
5Yamhill County58.7+1.1%
6Benton County56+0.7%
7Polk County47+0.2%
8Lane County32.4-1.1%
9Columbia County31.6+0.6%
10Jackson County30.7-0.4%
11Deschutes County26.7+1.1%
12Linn County22.2+0.8%
13Josephine County20.7+0.2%
14Lincoln County20+0.1%
15Clatsop County19.2-1.1%
16Hood River County17.6-0.9%
17Coos County15.6-0.9%
18Umatilla County9.6+0.5%
19Tillamook County9.6-0.2%
20Douglas County8.6+0.2%
21Jefferson County5.5+0.9%
22Curry County5.5-1.4%
23Union County4.9-0.8%
24Klamath County4.6-0.2%
25Wasco County4.3-0.7%
26Crook County3.5+2.1%
27Morrow County2.3+0.6%
28Baker County2.1-0.2%
29Malheur County1.3+1.4%
30Wallowa County0.9+0.1%
31Sherman County0.9+0.2%
32Gilliam County0.7+1.1%
33Grant County0.60%
34Lake County0.4-0.5%
35Wheeler County0.3+0.3%
36Harney County0.3-1%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

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. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

Which county has the highest population density?

Multnomah County, with 711.1 inhabitants per km² in 2023, according to the U.S. Census Bureau.

Which county has the lowest population density?

Harney County, with 0.3 inhabitants per km² in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

Counties in Oregon: more rankings