Marion County, Indiana
Located in Indiana, Marion County has a population of 975,809 residents and a median age of 34.4 years, making it the #54 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 15.3%. The median home value is $224,000, and the median household income is $66,346, which is 12% below the national median.
Demographics
Marion County has a population of 975,809, making it the #54 most populous county in the US. The median age is 34.4 years, which is 11.6% 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 $66,346, ranking #1,486 out of 3,222 counties — 11.7% below the national median. The poverty rate is 15.3% and unemployment stands at 5.0%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Marion County is $224,000 (-20.5% vs national). Renters pay a median of $1,153/mo and the homeownership rate is 56.5%.
Median Home Value Trend
Rankings →Household Type
Education
In Marion County, 34.8% of adults age 25+ hold a bachelor's degree or higher, which is 3.1% above the national average, ranking #473 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Marion County is 73.0 years. 21.7% of adults report poor or fair health and 9.8% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
17.6% of adults in Marion County smoke , 39.3% are obese , and 19.2% report excessive drinking. The drug overdose death rate is 69.7 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Marion County is 20.6 per 100,000 and the suicide rate is 15.1 per 100,000. Motor vehicle deaths occur at a rate of 14.5 per 100,000.
Homicide Rate Trend
Families & Children
20.7% of children in Marion County live in poverty and the infant mortality rate is 8.0 per 1,000 live births. The teen birth rate is 26.6 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Marion County is 58.5%. The mean commute time is 26.7 min, which is 3.4% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Marion County voted Democratic with a margin of 27.7%. The vote was 63% Dem / 35.3% Rep. Compared to 2020, the margin shifted 1.5 toward Republicans .
Vote Share Over Time
About Marion County, Indiana
Marion County, Indiana has a total population of 975,809, making it the 54th most populous county in the United States. The median age in Marion County is 34.4 years, which is 11.6% below the national median of 38.9 years.
The median household income in Marion County is $66,346, which ranks #1,486 of 3,222 counties nationwide. This is 11.7% below the national median of $75,149. The poverty rate is 15.3%, higher than the national rate of 12.6%. The unemployment rate stands at 5.0%.
The median home value in Marion County is $224,000, 20.5% below the national median. Renters in Marion County pay a median gross rent of $1,153 per month. The homeownership rate is 56.5%, compared to the national rate of 64.4%.
In Marion County, 34.8% of residents aged 25 and older hold a bachelor's degree or higher, 3.1% above the national average of 33.7%. Health insurance coverage stands at 91.2% 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 49.5% of the population, followed by Black (non-Hispanic) (27.1%) and Hispanic or Latino (13.8%).
All data for Marion County, Indiana 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.