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All Marion County population data above are from the US Census Bureau.
The population data for Marion County are from the Census' American Community Survey 2017 5-year estimates and the Census' 2018 Population Estimates. The demographic data for Clatsop County, Deschutes County, Jackson County, and Umatilla County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2017 5-year estimates, and were downloaded on 6 December 2018. Check out our FAQ section for more details.
With 346,868 people, Marion County is the 5th most populated county in the state of Oregon out of 36 counties. But watch out, Marion County, because Deschutes County with 191,996 people and Jackson County with 219,564 people are right behind you.
The largest Marion County racial/ethnic groups are White (66.3%) followed by Hispanic (26.0%) and Two or More (3.2%).
In 2017, the median household income of Marion County residents was $53,828. Marion County households made slightly more than Clatsop County households ($49,828) and Umatilla County households ($50,071) . However, 15.9% of Marion County residents live in poverty.
The median age for Marion County residents is 36.2 years young.
86% of people CANNOT find the data they're looking for on the US Census Bureau website. Source: Nielsen Norman Group
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