Hamilton County, Illinois
Located in Illinois, Hamilton County has a population of 7,916 residents and a median age of 43.9 years, making it the #2,657 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 12.1%. The median home value is $113,700, and the median household income is $65,746, which is 13% below the national median.
Demographics
Hamilton County has a population of 7,916, making it the #2,657 most populous county in the US. The median age is 43.9 years, which is 12.9% 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 $65,746, ranking #1,567 out of 3,222 counties — 12.5% below the national median. The poverty rate is 12.1% and unemployment stands at 5.1%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Hamilton County is $113,700 (-59.7% vs national). Renters pay a median of $568/mo and the homeownership rate is 76.4%.
Median Home Value Trend
Rankings →Household Type
Education
In Hamilton County, 21.0% of adults age 25+ hold a bachelor's degree or higher, which is 37.6% below the national average, ranking #1,818 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Hamilton County is 76.1 years. 18.7% of adults report poor or fair health and 7.0% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
18.2% of adults in Hamilton County smoke , 37.8% are obese , and 21.2% report excessive drinking.
Adult Smoking Trend
Safety
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Families & Children
17.0% of children in Hamilton County live in poverty . The teen birth rate is 17.2 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Hamilton County is 68.0%. The mean commute time is 29.5 min, which is 7.0% above 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 63.3%. The vote was 17.7% Dem / 81% Rep. Compared to 2020, the margin shifted 3.0 toward Republicans .
Vote Share Over Time
About Hamilton County, Illinois
Hamilton County, Illinois has a total population of 7,916, making it the 2,657th most populous county in the United States. The median age in Hamilton County is 43.9 years, which is 12.9% above the national median of 38.9 years.
The median household income in Hamilton County is $65,746, which ranks #1,567 of 3,222 counties nationwide. This is 12.5% below the national median of $75,149. The poverty rate is 12.1%, lower than the national rate of 12.6%. The unemployment rate stands at 5.1%.
The median home value in Hamilton County is $113,700, 59.7% below the national median. Renters in Hamilton County pay a median gross rent of $568 per month. The homeownership rate is 76.4%, compared to the national rate of 64.4%.
In Hamilton County, 21.0% of residents aged 25 and older hold a bachelor's degree or higher, 37.6% below the national average of 33.7%. Health insurance coverage stands at 92.4% of the population. The average commute time for workers is 29.5 min.
Hamilton County is a community. The largest racial or ethnic group is White (non-Hispanic) at 94.7% of the population, followed by Two or More Races (3.2%).
All data for Hamilton County, Illinois 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.