Hamilton County, Iowa
Located in Iowa, Hamilton County has a population of 14,886 residents and a median age of 41.7 years, making it the #2,168 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 7.4%. The median home value is $156,400, and the median household income is $72,432, which is 4% below the national median.
Demographics
Hamilton County has a population of 14,886, making it the #2,168 most populous county in the US. The median age is 41.7 years, which is 7.2% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Hamilton County is $72,432, ranking #1,018 out of 3,222 counties — 3.6% below the national median. The poverty rate is 7.4% and unemployment stands at 4.8%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Hamilton County is $156,400 (-44.5% vs national). Renters pay a median of $877/mo and the homeownership rate is 73.4%.
Median Home Value Trend
Rankings →Household Type
Education
In Hamilton County, 22.8% of adults age 25+ hold a bachelor's degree or higher, which is 32.5% below the national average, ranking #1,536 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Hamilton County is 77.2 years. 14.5% of adults report poor or fair health and 5.2% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
15.4% of adults in Hamilton County smoke , 35.4% are obese , and 24.5% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 23.1 per 100,000. Motor vehicle deaths occur at a rate of 14.4 per 100,000.
Suicide Rate Trend
Families & Children
11.4% of children in Hamilton County live in poverty . The teen birth rate is 19.9 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Hamilton County is 70.7%. The mean commute time is 23.8 min, which is 13.9% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Hamilton County voted Republican with a margin of 33.3%. The vote was 32.8% Dem / 66.1% Rep. Compared to 2020, the margin shifted 6.7 toward Republicans .
Vote Share Over Time
About Hamilton County, Iowa
Hamilton County, Iowa has a total population of 14,886, making it the 2,168th most populous county in the United States. The median age in Hamilton County is 41.7 years, which is 7.2% above the national median of 38.9 years.
The median household income in Hamilton County is $72,432, which ranks #1,018 of 3,222 counties nationwide. This is 3.6% below the national median of $75,149. The poverty rate is 7.4%, lower than the national rate of 12.6%. The unemployment rate stands at 4.8%.
The median home value in Hamilton County is $156,400, 44.5% below the national median. Renters in Hamilton County pay a median gross rent of $877 per month. The homeownership rate is 73.4%, compared to the national rate of 64.4%.
In Hamilton County, 22.8% of residents aged 25 and older hold a bachelor's degree or higher, 32.5% below the national average of 33.7%. Health insurance coverage stands at 94.3% of the population. The average commute time for workers is 23.8 min.
Hamilton County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 83.8% of the population, followed by Hispanic or Latino (10.1%) and Asian (non-Hispanic) (2.3%).
All data for Hamilton County, Iowa comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.