Marion County, Oregon Demographics 2026

Population Overview

Marion County is located in Oregon with a total population of 346,532. It is the 5th most populous county out of 36 in Oregon.

Age Demographics

The median age in Marion County is 37.2 years. This is 7% lower than the state median of 40.1 years.

Economy, Income & Housing

The median household income in Marion County is $74,624. This is 7% lower than the state median of $80,426. Compared to the national median of $78,538, household income here is 5% lower. The poverty rate stands at 13.1%. This is 10% higher than the state poverty rate of 11.9%. The unemployment rate is 5.2%. This is 4% lower than the state rate of 5.4%. The median home value is $383,300. Housing costs are 16% lower than the state median of $454,200. The home-value-to-income ratio is 5.1x. 62.2% of occupied housing units are owner-occupied. This homeownership rate is 2% lower than the state average of 63.4%.

Race & Ethnicity

The largest racial or ethnic group in Marion County is White (non-Hispanic), making up 61.8% of the population. Hispanic or Latino residents account for 28.3%. The Hispanic or Latino population is significantly higher than the state average (28.3% vs 14.3%). The Asian population (2.1%) is well below the state average of 4.4%.

Education

26.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 28% lower than the state rate of 36.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 86.1%.