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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%1661,821Multnomah County location
Washington County597,644-0.58%279825Washington County location
Clackamas County423,2280.18%722226Clackamas County location
Lane County380,181-0.82%1.8K83Lane County location
Marion County346,7630.12%456294Marion County location
Jackson County219,867-1.68%1.1K79Jackson County location
Deschutes County210,5435.55%1.2K70Deschutes County location
Linn County132,3702.63%88458Linn County location
Douglas County112,5801.15%1.9K22Douglas County location
Yamhill County108,9260.91%276152Yamhill County location
Benton County97,7652.68%261145Benton County location
Polk County90,0172.34%286121Polk County location
Josephine County87,842-0.45%63354Josephine County location
Umatilla County79,845-0.33%1.2K25Umatilla County location
Klamath County69,8160.38%2.3K12Klamath County location
Coos County63,501-2.27%61640Coos County location
Columbia County54,1532.71%25482Columbia County location
Lincoln County50,8900.75%37952Lincoln County location
Clatsop County40,552-1.48%32049Clatsop County location
Malheur County32,2301.86%3.8K3Malheur County location
Crook County27,52710.42%1.1K9Crook County location
Tillamook County27,313-0.54%42625Tillamook County location
Wasco County26,111-1.99%91911Wasco County location
Union County25,723-1.72%78613Union County location
Jefferson County25,5844.08%68814Jefferson County location
Hood River County23,455-2.12%20145Hood River County location
Curry County22,979-2.3%62814Curry County location
Baker County16,8870.93%1.2K6Baker County location
Morrow County12,3120.74%7846Morrow County location
Lake County8,2130.5%3.1K1Lake County location
Wallowa County7,6983.94%1.2K2Wallowa County location
Harney County7,348-2.12%3.9K1Harney County location
Grant County7,205-0.48%1.7K2Grant County location
Gilliam County2,0441.39%4652Gilliam County location
Sherman County1,9554.49%3182Sherman County location
Wheeler County1,437-1.17%6621Wheeler 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%).

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)