Piatt County, Illinois Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Piatt County, IL Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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B
Health Around averageHealthier than 90% of counties in Illinois
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B
Income Around averageWealthier than 91% of counties in Illinois
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C
Education Below averageBetter educated than 82% of counties in Illinois
Source: Map AI Methodology
Population: density and quick facts
| Metric | Piatt County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Population | 16,695 | 12,692,444 | 337,468,954 |
| Population density (per sq mi) | 38.0 | 219.1 | 86.4 |
| Population growth (%/yr) | 0.17% | -0.16% | 0.59% |
| Median age | 40.3 | 37.4 | 37.3 |
| Households | 6,924 | 5,035,584 | 130,235,071 |
Population in Piatt County grew by 1.2% from 2009 to 2024, reaching 16,695 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Piatt County is Gen X, aged 45–60, at 21.9% of residents. That is 1.5 points above Illinois as a whole.
- Gen Z 13–28 2,924 17.5% -3.7 pts
- Millennials 29–44 3,272 19.6% -2.3 pts
- Gen X 45–60 3,654 21.9% +1.5 pts
- Boomers 61–79 3,347 20.0% +3.1 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Illinois, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.8% of the people living in Piatt County and men 49.2%.
- Women 50.8% Illinois 50.6%
- Men 49.2% Illinois 49.4%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Piatt County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Piatt County has a the economy index of B, which means it is quite prosperous.
| Metric | Piatt County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median household income | $92,291 | $84,042 | $80,455 |
| Income growth (%/yr) | 3.77% | 4.46% | 4.80% |
| Unemployment rate | 2.8% | 5.8% | 5.2% |
The median household income in Piatt County is about 10% higher than in Illinois.
Housing
| Metric | Piatt County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median home price | $38,940 | $149,936 | $248,835 |
| Median rent | $1,046 | $1,274 | $1,407 |
| Homeownership rate | 84.8% | 67.1% | 65.2% |
The median home price in Piatt County is about 3.1 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,046 per month for that long.
Commute Time & Mobility
Commuters in Piatt County spend about 50 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 209 hours, about 8.7 full days, spent commuting.
| Metric | Piatt County | Illinois Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 25.0 | 23.6 | 22.4 |
| Round-trip commute (min) | 50.1 | 47.3 | 44.8 |
| Yearly time spent (hours) | 209 | 197 | 187 |
| Estimated yearly cost | $6,469 | $6,104 | $5,790 |
| Work from home | 7.3% | 15.9% | 15.0% |
| Highway traffic (vehicles/day) | 4,720 | 7,977 | 8,813 |
| Local road traffic (vehicles/day) | 596 | 1,547 | 1,355 |
Fastest commutes among counties in
Illinois:
Edgar County (12.0 min), Brown County (12.7 min), Morgan County (13.1 min).
Slowest:
Calhoun County (43.8 min), Pulaski County (31.2 min), Pope County (31.0 min).
The average commute time in Piatt County is 25 minutes, longer than the 24 minutes in Illinois.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Piatt County has a education index of C, which means it is somewhat educated.
| Metric | Piatt County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 29.4% | 34.1% | 31.6% |
| Average household size | 2.38 | 2.46 | 2.53 |
Highest education index among counties in
Illinois:
DuPage County (0.4), Champaign County (0.4), Lake County (0.4).
Lowest:
Hardin County (0.2), Fayette County (0.2), Perry County (0.2).
Health
Piatt County has a health index of B, which means it is quite healthy.
| Metric | Piatt County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 79.6 | 77.9 | 78.3 |
| Self-rated poor health | 12.4% | 15.6% | 16.3% |
| Smokers | 16.8% | 19.2% | 19.0% |
Highest health index among counties in
Illinois:
DuPage County (0.8), Champaign County (0.8), Monroe County (0.8).
Lowest:
Alexander County (0.8), Pulaski County (0.8), Gallatin County (0.8).
Piatt County, IL Compared With Nearby Counties
How Piatt County, IL compares with the 2 counties closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Piatt County, IL | 16,695 | $92,291 #1/3 | $38,940 #3/3 | 25.0 min #3/3 |
| Macon County, IL | 101,849 | $62,654 | $65,982 | 16.7 min |
| Champaign County, IL | 208,737 | $64,164 | $86,997 | 15.8 min |
Frequently Asked Questions
Common questions about Piatt County, Illinois.
How big is Piatt County, Illinois by population?
About 16,695 people live in Piatt County, Illinois, in 6,924 households of 2.4 people on average. The median age is 40.3, so residents are older than the U.S. median of 37.3 by about 3 years.
Is Piatt County, Illinois urban or rural?
Averaged over its land area, Piatt County, Illinois has 38 people per square mile, a density typical of rural areas. That is about 44% of the U.S. average of 86.
Can a typical household afford a home in Piatt County, Illinois?
The median home costs 0.4 times the median household income ($38,940 against $92,291), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,046 a month takes about 14% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How strong is the job market in Piatt County, Illinois?
Unemployment in Piatt County, Illinois is only 2.8%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
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