Hamilton County, Indiana Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Hamilton County, IN Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A
Health Above averageHealthiest county in Indiana
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A+
Income Top gradeWealthiest county in Indiana
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A+
Education Top gradeBest educated county in Indiana
Source: Map AI Methodology
Population: density and quick facts
| Metric | Hamilton County | Indiana Avg | U.S. Average |
|---|---|---|---|
| Population | 365,056 | 6,845,048 | 337,468,954 |
| Population density (per sq mi) | 907.6 | 188.1 | 86.4 |
| Population growth (%/yr) | 2.35% | 0.47% | 0.59% |
| Median age | 36.2 | 35.9 | 37.3 |
| Households | 137,252 | 2,713,821 | 130,235,071 |
Population in Hamilton County grew by 39.7% from 2009 to 2024, reaching 365,056 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Hamilton County is Millennials, aged 29–44, at 23.9% of residents. That is 2.7 points above Indiana as a whole.
- Gen Z 13–28 72,593 19.9% -2.3 pts
- Millennials 29–44 87,228 23.9% +2.7 pts
- Gen X 45–60 80,668 22.1% +2.6 pts
- Boomers 61–79 45,440 12.4% -4.3 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 Indiana, 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 50.8% of the people living in Hamilton County and men 49.2%.
- Women 50.8% Indiana 50.4%
- Men 49.2% Indiana 49.6%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Hamilton County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Hamilton County has a the economy index of A+, which means it is exceptionally prosperous.
| Metric | Hamilton County | Indiana Avg | U.S. Average |
|---|---|---|---|
| Median household income | $121,444 | $71,967 | $80,455 |
| Income growth (%/yr) | 4.06% | 4.54% | 4.80% |
| Unemployment rate | 2.8% | 4.3% | 5.2% |
The median household income in Hamilton County is about 69% higher than in Indiana.
Housing
| Metric | Hamilton County | Indiana Avg | U.S. Average |
|---|---|---|---|
| Median home price | $339,003 | $142,738 | $248,835 |
| Median rent | $1,574 | $1,062 | $1,407 |
| Homeownership rate | 76.1% | 70.6% | 65.2% |
The median home price in Hamilton County is about 17.9 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,574 per month for that long.
Commute Time & Mobility
Commuters in Hamilton County spend about 47 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 195 hours, about 8.1 full days, spent commuting.
| Metric | Hamilton County | Indiana Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 23.5 | 21.1 | 22.4 |
| Round-trip commute (min) | 46.9 | 42.2 | 44.8 |
| Yearly time spent (hours) | 195 | 176 | 187 |
| Estimated yearly cost | $6,060 | $5,455 | $5,790 |
| Work from home | 23.3% | 10.7% | 15.0% |
| Highway traffic (vehicles/day) | 16,237 | 8,333 | 8,813 |
| Local road traffic (vehicles/day) | 2,376 | 1,308 | 1,355 |
Fastest commutes among counties in
Indiana:
Knox County (15.8 min), Howard County (15.9 min), Daviess County (16.3 min).
Slowest:
Crawford County (33.6 min), Brown County (32.6 min), Franklin County (31.9 min).
The average commute time in Hamilton County is 23 minutes, longer than the 21 minutes in Indiana.
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
Hamilton County has a education index of A+, which means it is exceptionally educated.
| Metric | Hamilton County | Indiana Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 56.7% | 26.0% | 31.6% |
| Average household size | 2.64 | 2.45 | 2.53 |
Highest education index among counties in
Indiana:
Hamilton County (0.4), Boone County (0.4), Monroe County (0.3).
Lowest:
LaGrange County (0.1), Crawford County (0.2), Switzerland County (0.2).
Health
Hamilton County has a health index of A, which means it is very healthy.
| Metric | Hamilton County | Indiana Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 81.1 | 77.4 | 78.3 |
| Self-rated poor health | 10.0% | 17.1% | 16.3% |
| Smokers | 12.8% | 22.4% | 19.0% |
Highest health index among counties in
Indiana:
Hamilton County (0.8), Monroe County (0.8), Boone County (0.8).
Lowest:
LaGrange County (0.8), Daviess County (0.8), Switzerland County (0.8).
Hamilton County, IN Compared With Nearby Counties
Hamilton County, IN is the 2nd largest of the 5 counties compared here, 365,056 residents against a local median of 107,969. Where Hamilton County, IN breaks from the counties next to it is median home price, sitting 145% above the local median of $138,100 at $339,003.
Median household income tells the same story from another angle: $121,444 against a local median of $65,483, 85% above it. The one measure here that carries a verdict is median household income, and at 85% above the local median it puts Hamilton County, IN at the better end of the local range. The counties themselves spread $355,580 on median home price, so Hamilton County, IN sits at one end of an already wide local range rather than apart from it. Hamilton County, IN has the 2nd highest median home price of the 5 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Hamilton County, IN | 365,056 | $121,444 #1/5 | $339,003 #2/5 | 23.5 min #4/5 |
| Marion County, IN | 971,946 | $66,629 | $146,421 | 22.5 min |
| Madison County, IN | 131,900 | $63,494 | $129,779 | 22.5 min |
| Hancock County, IN | 84,037 | $95,052 | $385,184 | 26.2 min |
| Howard County, IN | 83,752 | $64,338 | $29,604 | 15.9 min |
Frequently Asked Questions
Common questions about Hamilton County, Indiana.
How many people live in Hamilton County, Indiana?
About 365,056 people live in Hamilton County, Indiana, in 137,252 households of 2.6 people on average. The median age is 36.2, close to the U.S. median of 37.3.
How densely populated is Hamilton County, Indiana?
Averaged over its land area, Hamilton County, Indiana has 908 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 10 times the U.S. average of 86.
How affordable is housing in Hamilton County, Indiana?
The median home costs 2.8 times the median household income ($339,003 against $121,444), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,574 a month takes about 16% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is unemployment high in Hamilton County, Indiana?
Unemployment in Hamilton County, Indiana is only 2.8%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How common is a college degree in Hamilton County, Indiana?
56.7% of adults in Hamilton County, Indiana hold a bachelor's degree or higher (about 6 in 10), well above the U.S. share of 31.6%.
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