Hamilton County, Indiana
Organized in 1823 and named for Alexander Hamilton, first secretary of the treasury
County Seat: Noblesville
Largest City: Carmel (2025 population: 105,634)
Population per Square Mile: 981.58
Square Miles: 394.30
Go to county's in.gov site
| Population over Time | Number | Rank in State | Percent of State | Indiana |
|---|
| Yesterday (2020) | 347,467 | 4 | 5.4% | 6,484,050 |
| Today (2025) | 387,036 | 4 | 5.6% | 6,973,333 |
| Tomorrow (2030 projection)* | 417,426 | 3 | 6.0% | 7,013,509 |
| Percent Change 2020 to Today | 11.4% | 2 | | 2.8% |
*Projection based on 2020 Census population estimates.
Sources: U.S. Census Bureau; Indiana Business Research Center
| Components of Population Change, 2024-2025 | Number | Rank in State | Percent of State | Indiana |
|---|
| Net Domestic Migration | 4,121 | 1 | | 12,197 |
| Net International Migration | 1,602 | 3 | | 17,852 |
| Natural Increase (births minus deaths) | 1,618 | 2 | 18.9% | 8,561 |
Source: U.S. Census Bureau
| Population Estimates by Age, 2024 | Number | Rank in State | Pct Dist.
in County | Pct Dist.
in State |
|---|
| Preschool (0 to 4) | 21,393 | 4 | 5.6% | 5.9% |
| School Age (5 to 17) | 71,351 | 4 | 18.8% | 17.0% |
| College Age (18 to 24) | 30,647 | 7 | 8.1% | 9.7% |
| Young Adult (25 to 44) | 102,296 | 4 | 26.9% | 25.9% |
| Older Adult (45 to 64) | 97,417 | 3 | 25.7% | 23.9% |
| Seniors (65 and older) | 56,600 | 4 | 14.9% | 17.5% |
| Median Age | 38.9 | | | Median Age = 38.3 |
Sources: U.S. Census Bureau; Indiana Business Research Center
| Population Estimates by Race and Hispanic Origin, 2024 | Number | Rank of | Pct Dist.
in County | Pct Dist.
in State |
|---|
| American Indian or Alaska Native Alone | 1,075 | 6 | 0.3% | 0.5% |
| Asian Alone | 29,876 | 2 | 7.9% | 3.1% |
| Black Alone | 21,118 | 6 | 5.6% | 10.6% |
| Native Hawaiian and Other Pac. Isl. Alone | 318 | 5 | 0.1% | 0.1% |
| White | 318,079 | 3 | 83.8% | 83.2% |
| Two or More Race Groups | 9,238 | 5 | 2.4% | 2.5% |
| Non-Hispanic | 356,364 | 4 | 93.9% | 90.9% |
| Hispanic | 23,340 | 6 | 6.1% | 9.1% |
Source: U.S. Census Bureau
| Household Types | Number | Rank in State | Pct Dist.
in County | Pct Dist.
in State |
|---|
| Households in 2024 (Includes detail not shown below) | 137,252 | 4 | 100.0% | 100.0% |
| Married With Children | 41,280 | 2 | 30.1% | 17.9% |
| Married Without Children | 44,588 | 3 | 32.5% | 29.3% |
| Single Parents | 8,423 | 5 | 6.1% | 8.8% |
| Living Alone | 29,872 | 5 | 21.8% | 29.6% |
Source: U.S. Census Bureau, American Community Survey 5-year estimates.
| Housing | Number | Rank in State | Pct Dist.
in County | Pct Dist.
in State |
|---|
| Total Housing Units in 2025 (estimate) | 158,835 | 4 | 100.0% | 100.0% |
| Total Housing Units in 2024 (includes vacant units) | 144,746 | 4 | 100.0% | 100.0% |
Owner Occupied
(Pct. distribution based on all housing units) | 104,416 | 4 | 72.1% | 64.4% |
| Median Value (2024) | $405,500 | 1 | | |
Renter Occupied
(Pct. distribution based on all housing units) | 32,836 | 6 | 22.7% | 26.9% |
| Median Rent (2024) | $1,401 | 1 | | |
Source: U.S. Census Bureau, American Community Survey 5-year estimates.
| Education | Number | Rank in State | Percent of State | Indiana |
|---|
| School Enrollment (2024/2025 Total Reported) | 67,555 | 3 | 6.0% | 1,132,621 |
| Public | 63,066 | 3 | 6.1% | 1,033,552 |
| Adults (25+ in 2024 ACS) | 243,378 | 4 | 5.3% | 4,596,004 |
| with High School diploma or higher | 97.3% | 1 | | 90.4% |
| with B.A. or higher degree | 61.9% | 1 | | 29.5% |
Sources: Indiana Department of Education; U.S. Census Bureau, American Community Survey 5-year estimates.
| Income and Poverty | Number | Rank in State | Percent of State | Indiana |
|---|
| Per Capita Personal Income (annual) in 2024 | $104,283 | 1 | 162.7% | 64,077 |
| Median Household Income in 2024 | 127,452 | 1 | 177.1% | $71,958 |
| Poverty Rate in 2024 | 4.7% | 92 | 38.8% | 12.1% |
| Poverty Rate among Children under 18 | 4.3% | 92 | 27.2% | 15.8% |
| Welfare (TANF) Monthly Average Families in 2025 | 52 | 19 | 1.1% | 4,863 |
| Food Stamp Recipients in 2025 | 7,424 | 19 | 1.3% | 578,293 |
| Free and Reduced Fee Lunch Recipients in 2024/2025 | 12,897 | 7 | 2.6% | 488,145 |
Sources: U.S. Bureau of Economic Analysis; U.S. Census Bureau; Indiana Family Social Services Administration; Indiana Department of Education
| Health and Vital Statistics | Number | Rank of | Percent of State | Indiana |
|---|
| Births, 2021 | 4,025 | 4 | 5.0% | 79,946 |
| Births to Teens, 2021 | 50 | 18 | 1.3% | 3,845 |
| Deaths, 2019 | 1,896 | 6 | 2.9% | 66,005 |
Source: Indiana State Department of Health
| Labor Force, 2025 | Number | Rank in State | Percent of State | Indiana |
|---|
| Total Resident Labor Force | 213,245 | 3 | 6.1% | 3,506,284 |
| Employed | 207,036 | 3 | 6.1% | 3,377,760 |
| Unemployed | 6,209 | 4 | 4.8% | 128,524 |
| Annual Unemployment Rate | 2.9 | 86 | 78.4% | 3.7 |
| April 2026 Unemployment Rate | 2.2 | 78 | 78.6% | 2.8 |
Source: STATS Indiana, using data from the Indiana Department of Workforce Development
| Employment and Earnings by Industry, 2024 | Employment | Pct Dist.
in County | Earnings ($000) | Pct Dist.
In County | Avg. Earnings Per Job |
|---|
| Total by place of work | 242,614 | 100.0% | $20,487,685 | 100.0% | $84,446 |
| Wage and Salary | 172,624 | 71.2% | $14,258,289 | 69.6% | $82,597 |
| Farm Proprietors | 446 | 0.2% | $24,534 | 0.1% | $55,009 |
| Nonfarm Proprietors | 69,544 | 28.7% | $3,624,078 | 17.7% | $52,112 |
| Farm | 641 | 0.3% | $34,399 | 0.2% | $53,665 |
| Nonfarm | 241,973 | 99.7% | $20,453,286 | 99.8% | $84,527 |
| Private | 226,139 | 93.2% | $19,192,168 | 93.7% | $84,869 |
| Accommodation, Food Serv. | 17,886 | 7.4% | $634,423 | 3.1% | $35,470 |
| Arts, Ent., Recreation | 6,379 | 2.6% | $208,013 | 1.0% | $32,609 |
| Construction | 12,223 | 5.0% | $1,508,629 | 7.4% | $123,425 |
| Health Care, Social Serv. | 22,996 | 9.5% | $2,333,239 | 11.4% | $101,463 |
| Information | 3,433 | 1.4% | $0 | 0.0% | $0 |
| Manufacturing | 8,850 | 3.6% | $923,387 | 4.5% | $104,338 |
| Professional, Tech. Serv. | 25,101 | 10.3% | $3,776,273 | 18.4% | $150,443 |
| Retail Trade | 21,836 | 9.0% | $1,220,585 | 6.0% | $55,898 |
| Trans., Warehousing | 7,741 | 3.2% | $204,861 | 1.0% | $26,464 |
| Wholesale Trade | 9,671 | 4.0% | $1,426,476 | 7.0% | $147,500 |
| Other Private (not above) | 90,023 | 37.1% | $5,886,324 | 28.7% | $65,387 |
| Government | 15,834 | 6.5% | $1,261,118 | 6.2% | $79,646 |
Source: U.S. Bureau of Economic Analysis
| Residential Building Permits, 2025 | Units | Pct Dist.
in County | Pct Dist.
in State | Cost ($000) | State Cost ($000) |
|---|
| Total Permits Filed | 4,146 | 100.0% | 100.0% | $1,393,540 | $8,792,236 |
| Single-Family | 2,934 | 70.8% | 68.4% | $1,185,842 | $7,272,703 |
| 2-Family | 54 | 1.3% | 1.7% | 8,896 | $80,213 |
| 3- and 4-Family | 16 | 0.4% | 0.6% | $2,990 | $31,389 |
| 5+ Family | 1,142 | 27.5% | 29.3% | $195,812 | $1,407,931 |
Notes: Detail cost may not sum to total due to rounding. Greene County does not currently issue building permits, so it is excluded.
Source: U.S. Census Bureau
Largest Cities and Towns in Hamilton County
| Name | Population
in 2025 | Percent of County |
|---|
| Arcadia | 1,458 | 0.4% |
| Atlanta | 731 | 0.2% |
| Carmel | 105,634 | 27.3% |
| Cicero | 5,581 | 1.4% |
| Fishers | 104,812 | 27.1% |
| Noblesville | 76,111 | 19.7% |
| Sheridan | 5,746 | 1.5% |
| Westfield | 66,258 | 17.1% |
Source: U.S. Census Bureau annual population estimates
