Hamilton County's estimated 2026 population is 394,387 with a growth rate of 1.9% in the past year according to the most recent United States census data. Hamilton County is the 4th largest county in Indiana. The 2010 population was 276,499 and has seen a growth of 42.64% since that time.
Data after 2023 is projected based on recent change
Overall: 38.4 years
Female: 39.1 years
Male: 37.6 years
There are 272,320 adults, (50,673 of whom are seniors) in Hamilton County.
Female: 185,327 (50.8%)
Male: 179,729 (49.2%)
The racial composition of Hamilton County includes 80.19% White, 6.88% Asian, 4.48% Black or African American, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 292,742 | 80.19% |
| Asian | 25,107 | 6.88% |
| Two or more races | 24,695 | 6.76% |
| Black or African American | 16,360 | 4.48% |
| Other race | 5,648 | 1.55% |
| Native American | 341 | 0.09% |
| Native Hawaiian or Pacific Islander | 163 | 0.04% |
Hamilton County's average per capita income is $73,465. Household income levels show a median of $121,530. The poverty rate stands at 4.39%.
Name | Median | Mean |
|---|---|---|
| Married Families | $159,805 | $199,957 |
| Families | $146,219 | $184,812 |
| Households | $121,530 | $158,610 |
| Non Families | $63,964 | $83,208 |
Average Income
Median Household Income
Poverty Rate