Data / Rankings / Population density / Counties in Oregon

Counties in Oregon by population density, 2025

Multnomah County had the highest population density of 36 counties in 2025, at 712.5 inhabitants per km². Harney County had the lowest, at 0.3 inhabitants per km². The median was 9.7 inhabitants per km² and the figure for Oregon was 17.2 inhabitants per km². Source: the U.S. Census Bureau.

Highest712.5Multnomah County
Lowest0.3Harney County
Median9.736 counties
Oregon17.2History

All counties, 2025

CSVChart (SVG)

Multnomah CountyMultnomah County: 712.5 inhabitants per km²712.5Washington CountyWashington County: 326.1 inhabitants per km²326.1Marion CountyMarion County: 116.3 inhabitants per km²116.3Clackamas CountyClackamas County: 88 inhabitants per km²88Yamhill CountyYamhill County: 59.3 inhabitants per km²59.3Benton CountyBenton County: 55.9 inhabitants per km²55.9Polk CountyPolk County: 46.9 inhabitants per km²46.9Lane CountyLane County: 32.4 inhabitants per km²32.4Columbia CountyColumbia County: 31.7 inhabitants per km²31.7Jackson CountyJackson County: 30.8 inhabitants per km²30.8Deschutes CountyDeschutes County: 27.3 inhabitants per km²27.3Linn CountyLinn County: 22.4 inhabitants per km²22.4Josephine CountyJosephine County: 20.7 inhabitants per km²20.7Lincoln CountyLincoln County: 19.9 inhabitants per km²19.9Clatsop CountyClatsop County: 19.1 inhabitants per km²19.1Hood River CountyHood River County: 17.5 inhabitants per km²17.5Coos CountyCoos County: 15.5 inhabitants per km²15.5Umatilla CountyUmatilla County: 9.7 inhabitants per km²9.7Tillamook CountyTillamook County: 9.6 inhabitants per km²9.6Douglas CountyDouglas County: 8.6 inhabitants per km²8.6Jefferson CountyJefferson County: 5.6 inhabitants per km²5.6Curry CountyCurry County: 5.4 inhabitants per km²5.4Union 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: 3.6 inhabitants per km²3.6Morrow CountyMorrow County: 2.4 inhabitants per km²2.4Baker CountyBaker County: 2.1 inhabitants per km²2.1Malheur CountyMalheur County: 1.3 inhabitants per km²1.3Sherman CountySherman County: 1 inhabitants per km²1Wallowa CountyWallowa County: 0.9 inhabitants per km²0.9Gilliam CountyGilliam County: 0.6 inhabitants per km²0.6Grant 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

RankCounties2025
inhabitants per km²		Change on 2024
1Multnomah County712.5+0.1%
2Washington County326.1+0.5%
3Marion County116.3+0.7%
4Clackamas County88+0.2%
5Yamhill County59.3-0%
6Benton County55.9+0.1%
7Polk County46.9-0.2%
8Lane County32.4-0.1%
9Columbia County31.7+0.2%
10Jackson County30.8+0.2%
11Deschutes County27.3+0.9%
12Linn County22.4+0.2%
13Josephine County20.7-0.3%
14Lincoln County19.9-0.2%
15Clatsop County19.1-0.7%
16Hood River County17.5-0.1%
17Coos County15.5-0.4%
18Umatilla County9.7+0.2%
19Tillamook County9.6-0.1%
20Douglas County8.6-0.3%
21Jefferson County5.6+0.2%
22Curry County5.4-0.9%
23Union County4.9-0.2%
24Klamath County4.6-0.2%
25Wasco County4.3-0.6%
26Crook County3.6+0.9%
27Morrow County2.4+1.2%
28Baker County2.1-0.6%
29Malheur County1.3-0.3%
30Sherman County1+1.7%
31Wallowa County0.9-0.1%
32Gilliam County0.6-0.6%
33Grant County0.6-0.5%
34Lake County0.4+0.3%
35Wheeler County0.3+1.2%
36Harney County0.3-0.7%

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 712.5 inhabitants per km² in 2025, according to the U.S. Census Bureau.

Which county has the lowest population density?

Harney County, with 0.3 inhabitants per km² 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, 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