Piatt County, Illinois
Located in Illinois, Piatt County has a population of 16,695 residents and a median age of 42.8 years, making it the #2,059 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 6.1%. The median home value is $180,600, and the median household income is $94,811, which is 26% above the national median.
Demographics
Piatt County has a population of 16,695, making it the #2,059 most populous county in the US. The median age is 42.8 years, which is 10.0% 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 Piatt County is $94,811, ranking #226 out of 3,222 counties — 26.2% above the national median. The poverty rate is 6.1% and unemployment stands at 2.8%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Piatt County is $180,600 (-35.9% vs national). Renters pay a median of $1,046/mo and the homeownership rate is 84.8%.
Median Home Value Trend
Rankings →Household Type
Education
In Piatt County, 32.9% of adults age 25+ hold a bachelor's degree or higher, which is 2.4% below the national average, ranking #580 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Piatt County is 78.4 years. 13.8% of adults report poor or fair health and 5.1% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
14.0% of adults in Piatt County smoke , 33.8% are obese , and 23.4% report excessive drinking.
Adult Smoking Trend
Safety
. Motor vehicle deaths occur at a rate of 14.7 per 100,000.
Motor Vehicle Deaths Trend
Families & Children
8.0% of children in Piatt County live in poverty . The teen birth rate is 9.3 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Piatt County is 77.8%. The mean commute time is 26.0 min, which is 5.9% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Piatt County voted Republican with a margin of 30.6%. The vote was 33.7% Dem / 64.3% Rep. Compared to 2020, the margin shifted 1.0 toward Republicans .
Vote Share Over Time
About Piatt County, Illinois
Piatt County, Illinois has a total population of 16,695, making it the 2,059th most populous county in the United States. The median age in Piatt County is 42.8 years, which is 10.0% above the national median of 38.9 years.
The median household income in Piatt County is $94,811, which ranks #226 of 3,222 counties nationwide. This is 26.2% above the national median of $75,149. The poverty rate is 6.1%, lower than the national rate of 12.6%. The unemployment rate stands at 2.8%.
The median home value in Piatt County is $180,600, 35.9% below the national median. Renters in Piatt County pay a median gross rent of $1,046 per month. The homeownership rate is 84.8%, compared to the national rate of 64.4%.
In Piatt County, 32.9% of residents aged 25 and older hold a bachelor's degree or higher, 2.4% below the national average of 33.7%. Health insurance coverage stands at 96.7% of the population. The average commute time for workers is 26.0 min.
Piatt County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 94.8% of the population, followed by Hispanic or Latino (1.6%) and Two or More Races (1.6%).
All data for Piatt 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.