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Population of Counties in Oregon (2024)

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2024 Population
Growth Since 2020
Area (mi²)
Density (/mi²)
Multnomah County784,833-3.88%4311,821Multnomah County location
Washington County597,644-0.58%724825Washington County location
Clackamas County423,2280.18%1.9K226Clackamas County location
Lane County380,181-0.82%4.6K83Lane County location
Marion County346,7630.12%1.2K294Marion County location
Jackson County219,867-1.68%2.8K79Jackson County location
Deschutes County210,5435.55%3K70Deschutes County location
Linn County132,3702.63%2.3K58Linn County location
Douglas County112,5801.15%5K22Douglas County location
Yamhill County108,9260.91%716152Yamhill County location
Benton County97,7652.68%675145Benton County location
Polk County90,0172.34%741121Polk County location
Josephine County87,842-0.45%1.6K54Josephine County location
Umatilla County79,845-0.33%3.2K25Umatilla County location
Klamath County69,8160.38%6K12Klamath County location
Coos County63,501-2.27%1.6K40Coos County location
Columbia County54,1532.71%65982Columbia County location
Lincoln County50,8900.75%98152Lincoln County location
Clatsop County40,552-1.48%82849Clatsop County location
Malheur County32,2301.86%9.9K3Malheur County location
Crook County27,52710.42%3K9Crook County location
Tillamook County27,313-0.54%1.1K25Tillamook County location
Wasco County26,111-1.99%2.4K11Wasco County location
Union County25,723-1.72%2K13Union County location
Jefferson County25,5844.08%1.8K14Jefferson County location
Hood River County23,455-2.12%52245Hood River County location
Curry County22,979-2.3%1.6K14Curry County location
Baker County16,8870.93%3.1K6Baker County location
Morrow County12,3120.74%2K6Morrow County location
Lake County8,2130.5%8.1K1Lake County location
Wallowa County7,6983.94%3.1K2Wallowa County location
Harney County7,348-2.12%10.1K1Harney County location
Grant County7,205-0.48%4.5K2Grant County location
Gilliam County2,0441.39%1.2K2Gilliam County location
Sherman County1,9554.49%8242Sherman County location
Wheeler County1,437-1.17%1.7K1Wheeler County location
showing: 36 rows

There are 36 counties in Oregon. The most populous county in Oregon in 2019 is Multnomah County, home of Portland, with a population of 811,880. This represents population growth of 10.12% since the 2010 census. After Multnomah County is Washington County (597,695), Clackamas County (416,075), Lane County (379,611), Marion County (346,868), and Jackson County (219,564). These are the only counties with a population of more than 200,000. Of these counties, Washington County experienced the most dramatic population growth of 12.42% since the census.

Oregon Counties with Fewest Residents

The least populous county in Oregon is Wheeler County with 1,366 residents, a decline of 5.60% since the census. There are seven counties in Oregon with a population below 10,000. Other small counties in Oregon include Sherman County (1,708), Gilliam County (1,894), Wallowa County (7,081), Grant County (7,176), Harney County (7,329), and Lake County (7,879). Of these counties, only three have experienced positive or neutral growth. Wheeler County experienced the most dramatic decline.

Oregon Counties with Rapid Growth

Deschutes County, Oregon experienced the most rapid growth in the state since the census, growing 21.71% to 191,996 residents in 2019. Other counties that have experienced substantial growth include Crook County (14.28%), Polk County (12.83%), Washington County (12.42%), and Jefferson County (11.69%). Only six counties experienced decline since the census. The most significant decline was in Wheeler County (-5.60%) followed by Sherman County (-3.99%) and Grant County (-3.86%).

Population of Counties in Oregon (2024)

Lists of Counties in all States

  1. Oregon Population Research Center
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)