What is the population of Marion County, OR?
Marion County in Oregon has a population of 346,532, per Census ACS 5-Year estimates. The median household income is $74,624 and the median age is 37.2.
Context
Counties are the primary administrative subdivisions of states and a stable unit for tracking population. Marion County's population reflects everyone within county lines, including residents of incorporated cities and unincorporated areas.
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Marion County in Oregon has a population of 346,532, per Census ACS 5-Year estimates. The median household income is $74,624 and the median age is 37.2.