Marion County, Oregon
Located in Oregon, Marion County has a population of 349,244 residents and a median age of 37.5 years, making it the #214 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 13.0%. The median home value is $416,400, and the median household income is $77,351, which is 3% above the national median.
Demographics
Marion County has a population of 349,244, making it the #214 most populous county in the US. The median age is 37.5 years, which is 3.6% below the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Marion County is $77,351, ranking #707 out of 3,222 counties — 2.9% above the national median. The poverty rate is 13.0% and unemployment stands at 5.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Marion County is $416,400 (+47.7% vs national). Renters pay a median of $1,414/mo and the homeownership rate is 62.3%.
Median Home Value Trend
Rankings →Household Type
Education
In Marion County, 26.0% of adults age 25+ hold a bachelor's degree or higher, which is 22.7% below the national average, ranking #1,107 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Marion County is 77.5 years. 22.2% of adults report poor or fair health and 10.3% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
16.6% of adults in Marion County smoke , 39.4% are obese , and 19.7% report excessive drinking. The drug overdose death rate is 23.0 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Marion County is 3.1 per 100,000 and the suicide rate is 16.1 per 100,000. Motor vehicle deaths occur at a rate of 14.0 per 100,000.
Homicide Rate Trend
Families & Children
18.5% of children in Marion County live in poverty and the infant mortality rate is 4.3 per 1,000 live births. The teen birth rate is 17.5 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Marion County is 71.0%. The mean commute time is 26.7 min, which is 3.3% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Marion County voted Republican with a margin of 2.0%. The vote was 47.5% Dem / 49.5% Rep. Compared to 2020, the margin shifted 3.2 toward Republicans .
Vote Share Over Time
About Marion County, Oregon
Marion County, Oregon has a total population of 349,244, making it the 214th most populous county in the United States. The median age in Marion County is 37.5 years, which is 3.6% below the national median of 38.9 years.
The median household income in Marion County is $77,351, which ranks #707 of 3,222 counties nationwide. This is 2.9% above the national median of $75,149. The poverty rate is 13.0%, higher than the national rate of 12.6%. The unemployment rate stands at 5.3%.
The median home value in Marion County is $416,400, 47.7% above the national median. Renters in Marion County pay a median gross rent of $1,414 per month. The homeownership rate is 62.3%, compared to the national rate of 64.4%.
In Marion County, 26.0% of residents aged 25 and older hold a bachelor's degree or higher, 22.7% below the national average of 33.7%. Health insurance coverage stands at 91.4% of the population. The average commute time for workers is 26.7 min.
Marion County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 60.7% of the population, followed by Hispanic or Latino (29.0%) and Two or More Races (5.1%).
All data for Marion County, Oregon comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.