Marion County, Ohio Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Marion County, OH Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
-
C
Health Below averageLess healthy than 84% of counties in Ohio
-
D
Income Well below averageLess wealthy than 94% of counties in Ohio
-
F
Education Well below averageLess educated than 84% of counties in Ohio
Source: Map AI Methodology
Population: density and quick facts
| Metric | Marion County | Ohio Avg | U.S. Average |
|---|---|---|---|
| Population | 65,020 | 11,799,428 | 337,468,954 |
| Population density (per sq mi) | 160.9 | 263.2 | 86.4 |
| Population growth (%/yr) | -0.11% | 0.23% | 0.59% |
| Median age | 40.2 | 38.5 | 37.3 |
| Households | 24,683 | 4,857,236 | 130,235,071 |
Population in Marion County declined by 0.9% from 2009 to 2024, reaching 65,020 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Marion County is Millennials, aged 29–44, at 21.0% of residents. That is about the same share as Ohio.
- Gen Z 13–28 12,914 19.9% -1.0 pts
- Millennials 29–44 13,683 21.0% on par
- Gen X 45–60 13,672 21.0% +0.9 pts
- Boomers 61–79 12,104 18.6% +0.5 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Ohio, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 46.9% of the people living in Marion County and men 53.1%.
- Women 46.9% Ohio 50.8%
- Men 53.1% Ohio 49.2%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Marion County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Marion County has a the economy index of D, which means it is barely prosperous.
| Metric | Marion County | Ohio Avg | U.S. Average |
|---|---|---|---|
| Median household income | $59,541 | $71,509 | $80,455 |
| Income growth (%/yr) | 3.97% | 4.38% | 4.80% |
| Unemployment rate | 6.3% | 4.8% | 5.2% |
The median household income in Marion County is about 17% lower than in Ohio.
Housing
| Metric | Marion County | Ohio Avg | U.S. Average |
|---|---|---|---|
| Median home price | $150,236 | $139,044 | $248,835 |
| Median rent | $864 | $1,033 | $1,407 |
| Homeownership rate | 67.5% | 67.2% | 65.2% |
The median home price in Marion County is about 14.5 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $864 per month for that long.
Commute Time & Mobility
Commuters in Marion County spend about 35 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 145 hours, about 6.0 full days, spent commuting.
| Metric | Marion County | Ohio Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 17.3 | 21.1 | 22.4 |
| Round-trip commute (min) | 34.7 | 42.2 | 44.8 |
| Yearly time spent (hours) | 145 | 176 | 187 |
| Estimated yearly cost | $4,481 | $5,447 | $5,790 |
| Work from home | 6.2% | 13.0% | 15.0% |
| Highway traffic (vehicles/day) | 5,681 | 8,648 | 8,813 |
| Local road traffic (vehicles/day) | 602 | 1,212 | 1,355 |
Fastest commutes among counties in
Ohio:
Hancock County (15.3 min), Van Wert County (15.5 min), Mercer County (16.0 min).
Slowest:
Morgan County (32.5 min), Vinton County (32.0 min), Brown County (32.0 min).
The average commute time in Marion County is 17 minutes, shorter than the 21 minutes in Ohio.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Marion County has a education index of F, which means it scores poorly in education.
| Metric | Marion County | Ohio Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 12.5% | 28.1% | 31.6% |
| Average household size | 2.41 | 2.37 | 2.53 |
Highest education index among counties in
Ohio:
Delaware County (0.4), Warren County (0.4), Greene County (0.3).
Lowest:
Holmes County (0.1), Vinton County (0.2), Noble County (0.2).
Health
Marion County has a health index of C, which means it is somewhat healthy.
| Metric | Marion County | Ohio Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 75.0 | 77.0 | 78.3 |
| Self-rated poor health | 19.8% | 17.2% | 16.3% |
| Smokers | 28.6% | 24.3% | 19.0% |
Highest health index among counties in
Ohio:
Delaware County (0.8), Union County (0.8), Warren County (0.8).
Lowest:
Adams County (0.8), Holmes County (0.8), Scioto County (0.8).
Marion County, OH Compared With Nearby Counties
Marion County, OH is the 3rd largest of the 5 counties compared here, 65,020 residents against a local median of 54,517. The measure that sets Marion County, OH apart most is median household income: $59,541, 36% below the local median of $93,591. That is the weaker end of the local range on this measure.
Commute tells the same story from another angle: 17.3 min against a local median of 23.6 min, 27% below it. The picture is mixed rather than uniform: commute runs ahead of the neighbourhood while median household income runs behind it, so Marion County, OH is trading one against the other rather than simply out-performing what surrounds it. The counties themselves spread $75,939 on median household income, so Marion County, OH sits at one end of an already wide local range rather than apart from it. Marion County, OH has the 4th highest median household income of the 5 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Marion County, OH | 65,020 | $59,541 #4/5 | $150,236 #3/5 | 17.3 min #1/5 |
| Delaware County, OH | 226,834 | $134,160 | $454,424 | 23.8 min |
| Union County, OH | 67,322 | $111,904 | $242,497 | 23.4 min |
| Crawford County, OH | 41,711 | $58,221 | $83,950 | 19.0 min |
| Morrow County, OH | 35,404 | $75,278 | $54,907 | 31.5 min |
Frequently Asked Questions
Common questions about Marion County, Ohio.
What is the population of Marion County, Ohio?
About 65,020 people live in Marion County, Ohio, in 24,683 households of 2.4 people on average. The median age is 40.2, so residents are older than the U.S. median of 37.3 by about 3 years.
Is Marion County, Ohio mostly urban or rural?
Averaged over its land area, Marion County, Ohio has 161 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 1.9 times the U.S. average of 86.
Is Marion County, Ohio an affordable place to live?
The median home costs 2.5 times the median household income ($150,236 against $59,541), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $864 a month takes about 17% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How common is a college degree in Marion County, Ohio?
12.5% of adults in Marion County, Ohio hold a bachelor's degree or higher (about 1 in 8), well below the U.S. share of 31.6%.
Analyze any area in the US
Get local demographics for any address, aggregated by drive time or radius, on the interactive map.
Explore the map →