Marion County, Missouri
Located in Missouri, Marion County has a population of 28,457 residents and a median age of 39.6 years, making it the #1,524 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 14.2%. The median home value is $162,000, and the median household income is $62,903, which is 16% below the national median.
Demographics
Marion County has a population of 28,457, making it the #1,524 most populous county in the US. The median age is 39.6 years, which is 1.8% above 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 $62,903, ranking #1,807 out of 3,222 counties — 16.3% below the national median. The poverty rate is 14.2% and unemployment stands at 3.8%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Marion County is $162,000 (-42.5% vs national). Renters pay a median of $808/mo and the homeownership rate is 69.3%.
Median Home Value Trend
Rankings →Household Type
Education
In Marion County, 24.6% of adults age 25+ hold a bachelor's degree or higher, which is 26.9% below the national average, ranking #1,280 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Marion County is 73.9 years. 19.4% of adults report poor or fair health and 10.4% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
21.7% of adults in Marion County smoke , 36.1% are obese , and 20.2% report excessive drinking. The drug overdose death rate is 25.8 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 20.6 per 100,000. Motor vehicle deaths occur at a rate of 16.5 per 100,000.
Suicide Rate Trend
Families & Children
14.9% of children in Marion County live in poverty . The teen birth rate is 20.5 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Marion County is 61.5%. The mean commute time is 19.5 min, which is 29.3% 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 52.9%. The vote was 23.1% Dem / 76% Rep. Compared to 2020, the margin shifted 2.6 toward Republicans .
Vote Share Over Time
About Marion County, Missouri
Marion County, Missouri has a total population of 28,457, making it the 1,524th most populous county in the United States. The median age in Marion County is 39.6 years, which is 1.8% above the national median of 38.9 years.
The median household income in Marion County is $62,903, which ranks #1,807 of 3,222 counties nationwide. This is 16.3% below the national median of $75,149. The poverty rate is 14.2%, higher than the national rate of 12.6%. The unemployment rate stands at 3.8%.
The median home value in Marion County is $162,000, 42.5% below the national median. Renters in Marion County pay a median gross rent of $808 per month. The homeownership rate is 69.3%, compared to the national rate of 64.4%.
In Marion County, 24.6% of residents aged 25 and older hold a bachelor's degree or higher, 26.9% below the national average of 33.7%. Health insurance coverage stands at 92.1% of the population. The average commute time for workers is 19.5 min.
Marion County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 89.0% of the population, followed by Black (non-Hispanic) (4.2%) and Two or More Races (3.5%).
All data for Marion County, Missouri 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.