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Which counties in Oregon are losing population?

15 of the 36 counties in Oregon had fewer residents in 2025 than in 2020. Curry County lost the largest share, down 3.8% (−898 people). Multnomah County lost the most residents (−20,870).

Of the 15 counties that lost residents between 2020 and 2025, the largest factor was natural change (more deaths than births) in 13 and net domestic migration (more residents moving to other U.S. counties than arriving) in 2 (Census Bureau components of population change).

Data as of 2025 · updated

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All 15 Oregon counties that lost residents

Counties losing population in Oregon
RankCountyChange 2020–25Residents lost 2020–25Residents 2025Largest factor 2020–25
1Curry County−3.8%−89822,621Natural change (−1,576)
2Multnomah County−2.6%−20,870795,391Domestic migration (−37,128)
3Grant County−2.3%−1657,075Natural change (−194)
4Gilliam County−2.1%−431,971Natural change (−57)
5Harney County−1.7%−1277,380Natural change (−83)
6Coos County−1.5%−99063,992Natural change (−2,984)
7Wasco County−1.1%−30326,310Natural change (−600)
8Union County−1.0%−27125,900Natural change (−426)
9Jackson County−0.9%−1,958221,795Natural change (−3,767)
10Hood River County−0.7%−17823,720Domestic migration (−434)
11Lane County−0.7%−2,658381,584Natural change (−7,038)
12Clatsop County−0.6%−23040,926Natural change (−888)
13Baker County−0.4%−7016,658Natural change (−573)
14Josephine County−0.4%−34787,867Natural change (−3,311)
15Tillamook County−0.3%−7227,384Natural change (−835)

How this is ranked

Counties whose Census Bureau resident population estimate for July 1, 2025 is lower than for July 1, 2020, steepest percentage decline first. The largest factor is the most negative of natural change (births minus deaths), net domestic migration and net international migration over the same years (Census Bureau components of population change). Counties with fewer than 1,000 residents, or without a figure for the same period as the others, are left out, as on every ranking.

Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025). Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how ranks and figures are built. More on every layer: data sources and licences.

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Questions

Which county in Oregon is losing population fastest?

Curry County: down 3.8% between 2020 and 2025, to 22,621 residents (−898 people; Census Bureau population estimates). Next: Multnomah County (−2.6%) and Grant County (−2.3%).

How many counties in Oregon are losing population?

15 of the 36 counties in Oregon had fewer residents in 2025 than in 2020; the other 21 grew or held steady.

Why are counties in Oregon losing population?

Of the 15 counties that lost residents between 2020 and 2025, the largest factor was natural change (more deaths than births) in 13 and net domestic migration (more residents moving to other U.S. counties than arriving) in 2 (Census Bureau components of population change).

More county rankings for Oregon

Counties losing population in other states

Across the U.S.