County · Indiana
Hamilton County, Indiana
Hamilton County, Indiana. Hamilton County had 387,036 residents in 2025 by the Census Bureau's estimate, up 11.4% since 2020, faster than Indiana (+2.8%). It holds 21 places (8 cities, villages and boroughs, 9 towns and townships and 4 census-designated) and 57 census tracts. GEOID 18057.
Hamilton County is one of the 11 counties of the Indianapolis-Carmel-Greenwood, IN metropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
387,036
Census Bureau estimate (no margin published)
2020 Census count: 347,467 · ACS 2020-2024: 365,056
Median household income
$121,530
±$2,737 (90% margin)
Indiana: $71,957
Median home value
$405,500
±$5,201 (90% margin)
Indiana: $218,200
Median gross rent
$1,574
±$42 (90% margin)
Indiana: $1,062
How many people live in Hamilton County, and is it growing?
The 2020 Census counted 347,467 residents in Hamilton County. The Census Bureau estimates 387,036 for July 1, 2025, up 11.4% since 2020, faster than Indiana (+2.8%). The 2020-2024 American Community Survey puts the population at 365,056 over 394 square miles of land.
| Measure | Hamilton County | Indiana | Change since 2015-2019 |
|---|---|---|---|
| Total population | 365,056 | 6,851,073 | +41,939 |
| Households | 137,252±947 | 2,716,009 | +17,463 |
| Average household size | 2.64±0.02 | 2.46 | −0.04 |
| Housing units | 144,746±116 | 2,976,568 | +18,220 |
Hamilton County's population since 2000
From 182,740 in 2000 to 387,036 in 2025: up 111.8%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Hamilton County?
Hamilton County holds 21 places: 8 cities, villages and boroughs (incorporated places), 9 towns and townships (county subdivisions with their own government) and 4 census-designated places. The largest is Carmel with 105,634 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Carmel | 99,757 | $141,505 |
|---|---|---|
| Clay Township, Hamilton County | 99,093 | $142,449 |
| Fishers | 98,977 | $130,203 |
| Fall Creek Township, Hamilton County | 70,892 | $146,226 |
| Noblesville | 69,604 | $104,047 |
| Noblesville Township | 64,067 | $103,845 |
| Westfield Washington Township | 49,262 | $120,664 |
| Westfield | 46,410 | $122,789 |
| Delaware Township, Hamilton County | 34,723 | $102,471 |
| Wayne Township, Hamilton County | 10,935 | $94,037 |
| Jackson Township, Hamilton County | 10,863 | $84,913 |
| Cicero | 5,301 | $66,934 |
| Adams Township, Hamilton County | 5,218 | $70,684 |
| Sheridan | 3,106 | $66,534 |
| White River Township, Hamilton County | 2,414 | $82,161 |
| Arcadia | 1,515 | $66,901 |
| Atlanta | 712 | $69,286 |
| HortonvilleGEOID 1834816 | – | $71,518 |
| BoxleyGEOID 1806904 | – | not published |
| RiverwoodGEOID 1864944 | – | not published |
| FishersburgGEOID 1823296 | – | $46,429 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Hamilton County?
The median resident of Hamilton County is 38.4 years old; 25.4% are under 18 and 13.9% are 65 or older. The largest group is non-Hispanic white residents at 78.6%, then non-Hispanic Asian residents at 6.9%. 10.3% of residents were born outside the United States.
| Measure | Hamilton County | Indiana | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.4±0.2 | 38.1 | +1.3 |
| Under 18 years | 25.4%±0.1 pts | 23.3% | – |
| 65 years and over | 13.9%±0.1 pts | 16.8% | – |
| Hispanic or Latino (any race) | 5.6% | 8.6% | +1.6 pts |
| White alone, not Hispanic | 78.6%±0.3 pts | 75.4% | −5.1 pts |
| Black or African American alone, not Hispanic | 4.4%±0.3 pts | 9.1% | +0.5 pts |
| Asian alone, not Hispanic | 6.9%±0.3 pts | 2.6% | +1.0 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.8%±0.5 pts | 3.8% | – |
| Some other race alone, not Hispanic | 0.6%±0.2 pts | 0.4% | – |
| Born outside the United States | 10.3%±0.6 pts | 6.3% | +2.2 pts |
| Speak a language other than English at home (age 5+) | 12.5%±0.7 pts | 10.3% | – |
| Civilian veterans (age 18+) | 4.8%±0.4 pts | 6.3% | – |
| With a disability | 8.0%±0.5 pts | 14.2% | – |
| No health insurance coverage | 4.1%±0.5 pts | 7.4% | no clear change |
| High school graduate or higher (age 25+) | 97.3%±0.3 pts | 90.4% | – |
| Bachelor's degree or higher (age 25+) | 61.9%±1.2 pts | 29.5% | +2.6 pts |
| Graduate or professional degree (age 25+) | 23.5%±0.8 pts | 10.8% | – |
| Moved from another state in the past year | 2.3%±0.3 pts | 2.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Hamilton County earn?
Half of Hamilton County's 137,252 households earn less than $121,530 a year (±$2,737), against $71,957 in Indiana. In 2015-2019 it was $120,821 in 2024 dollars; the margins of error cannot tell the two periods apart. 4.4% of residents live below the poverty line.
| Measure | Hamilton County | Indiana | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $121,530±$2,737 | $71,957 | no clear change |
| Mean household income | $158,610±$3,010 | $95,247 | – |
| Per capita income | $60,278±$1,129 | $38,351 | no clear change |
| People below the poverty line | 4.4%±0.5 pts | 12.3% | no clear change |
| Children under 18 below the poverty line | 4.4%±1.0 pts | 16.0% | no clear change |
| Households receiving SNAP | 2.5%±0.4 pts | 9.1% | – |
| Households with a broadband subscription | 96.3%±0.5 pts | 89.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Hamilton County?
Owners occupy 76.1% of Hamilton County's occupied homes and renters 23.9%. The median owner-occupied home is valued at $405,500 by its owner (±$5,201). The median renter pays $1,574 a month including utilities, and 32.5% of renters pay 35% or more of their income on rent.
| Measure | Hamilton County | Indiana | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $405,500±$5,201 | $218,200 | +$81,458 |
| Median gross rent | $1,574±$42 | $1,062 | +$127 |
| Renters paying 35% or more of income on rent | 32.5%±2.9 pts | 38.9% | no clear change |
| Median monthly owner costs, with a mortgage | $2,133±$38 | $1,404 | – |
| Owner-occupied homes | 76.1%±0.9 pts | 70.6% | no clear change |
| Housing units | 144,746±116 | 2,976,568 | +18,220 |
| Homeowner vacancy rate | 1.0%±0.4 pts | 0.8% | – |
| Rental vacancy rate | 6.6%±1.3 pts | 5.6% | – |
| Single-family detached homes | 74.8%±0.9 pts | 72.6% | – |
| Mobile homes | 1.5%±0.3 pts | 4.4% | – |
| Built 2020 or later | 5.0%±0.5 pts | 1.7% | – |
| Built 1939 or earlier | 3.5%±0.4 pts | 16.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Hamilton County building?
Builders took permits for 4,146 new housing units across Hamilton County in 2025 (2,934 single-family), 10.7 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Hamilton County get to work?
68.9% of Hamilton County's workers drive alone and 23.3% work from home. The average trip to work takes 25.9 minutes. The unemployment rate in 2020-2024 averaged 2.8%.
| Measure | Hamilton County | Indiana | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 71.2%±0.8 pts | 63.8% | – |
| Unemployment rate | 2.8%±0.4 pts | 4.3% | no clear change |
| Drove alone to work | 68.9%±1.1 pts | 76.3% | – |
| Carpooled | 6.0%±0.6 pts | 9.1% | – |
| Public transportation | 0.0%±0.1 pts | 0.6% | – |
| Walked | 0.8%±0.2 pts | 1.9% | – |
| Worked from home | 23.3%±1.0 pts | 10.7% | +14.3 pts |
| Mean travel time to work | 25.9 min±0.5 | 24.1 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Hamilton County's census tracts?
Hamilton County is divided into 57 census tracts. Among those with a reliable estimate, median household income runs from $58,568 (Tract 1107) to $250,000 or more (Tract 1110.09).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Hamilton County compare with Indiana's other counties?
| Measure | Rank |
|---|---|
| Population | 4th of 92 |
| Growth 2020-2025 | 3rd of 92 |
| Residents per square mile | 3rd of 92 |
| Median household income | 1st of 92 |
| Median home value | 1st of 92 |
| Median gross rent | 1st of 92 |
| Poverty rate | 92nd of 92 |
| Bachelor's degree or higher | 1st of 92 |
| Median age | 75th of 92 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Hamilton County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.