Hamilton County's estimated 2026 population is 14,890 with a growth rate of -0.36% in the past year according to the most recent United States census data. Hamilton County is the 49th largest county in Iowa. The 2010 population was 15,634 and has seen a growth of -4.76% since that time.
Data after 2023 is projected based on recent change
Overall: 41.7 years
Female: 44 years
Male: 40.1 years
There are 11,339 adults, (3,157 of whom are seniors) in Hamilton County.
Female: 7,220 (48.5%)
Male: 7,666 (51.5%)
The racial composition of Hamilton County includes 86.46% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 12,870 | 86.46% |
| Two or more races | 1,117 | 7.5% |
| Other race | 347 | 2.33% |
| Asian | 338 | 2.27% |
| Black or African American | 144 | 0.97% |
| Native American | 49 | 0.33% |
| Native Hawaiian or Pacific Islander | 21 | 0.14% |
Hamilton County's average per capita income is $52,709. Household income levels show a median of $72,432. The poverty rate stands at 7.4%.
Name | Median | Mean |
|---|---|---|
| Married Families | $104,415 | - |
| Families | $91,821 | $112,328 |
| Households | $72,432 | $92,073 |
| Non Families | $45,340 | $56,134 |
Average Income
Median Household Income
Poverty Rate