PlainCities

Counties · Oregon

Counties of Oregon

Oregon has 36 counties. Multnomah County is the largest with 795,391 residents in 2025. 21 of the 36 gained residents between 2020 and 2025 by the Census Bureau's estimates.

What counties are in Oregon?

Sorted by the 2025 population estimate; sort by any column.

Counties of Oregon: 2025 estimate, change since 2020, ACS 2020-2024 5-year estimates
Multnomah County795,391−2.5%12197$88,766$552,700
Washington County611,708+1.9%31134$107,772$588,000
Clackamas County426,280+1.2%2787$103,517$611,000
Lane County381,584−0.4%2293$71,544$430,600
Marion County355,777+2.8%2765$77,351$416,400
Jackson County221,795−0.7%1752$73,999$430,200
Deschutes County213,072+7.5%1545$92,758$650,900
Linn County132,843+3.3%2428$76,329$376,400
Douglas County111,951+0.7%2330$61,310$310,300
Yamhill County110,024+2.1%1319$90,063$471,700
Benton County97,728+2.7%1122$77,702$513,000
Polk County90,037+3.0%1016$85,118$454,700
Josephine County87,867−0.2%1022$60,098$404,300
Umatilla County81,119+1.3%2218$67,728$282,600
Klamath County70,274+1.2%2022$58,830$280,400
Coos County63,992−1.4%1122$62,143$337,800
Columbia County54,091+2.8%911$87,458$421,600
Lincoln County50,636+0.5%1219$63,165$410,800
Clatsop County40,926−0.4%1012$71,822$468,300
Malheur County32,261+2.2%98$54,519$248,900
Crook County27,564+11.4%47$81,965$467,000
Tillamook County27,384−0.0%2111$69,105$430,200
Wasco County26,310−1.3%138$64,175$367,400
Union County25,900−1.1%88$65,661$294,600
Jefferson County25,740+5.0%68$76,260$374,200
Hood River County23,720−1.1%56$88,947$660,000
Curry County22,621−3.5%88$62,244$381,300
Baker County16,658−0.1%86$60,936$285,600
Morrow County12,602+3.4%53$75,448$240,400
Lake County8,187+0.3%52$62,787$219,500
Wallowa County7,595+2.8%53$67,112$394,800
Harney County7,380−1.6%33$55,208$242,100
Grant County7,075−2.2%103$59,450$229,700
Sherman County2,051+9.5%51$60,161$211,800
Gilliam County1,971−1.1%31$66,917$189,300
Wheeler County1,472+1.6%31$55,284$272,400

Source: PEP Vintage 2025 (CO-EST2025); American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Census population estimates

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections