St. Charles, Illinois Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
St. Charles, 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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A
Health Above average
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A
Income Above average
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A+
Education Top grade
Source: Map AI Methodology
Population
| Metric | St. Charles | Illinois Avg | U.S. Average |
|---|---|---|---|
| Population | 31,856 | 12,692,444 | 337,468,954 |
| Population density (per sq mi) | 2115.5 | 219.1 | 86.4 |
| Population growth (%/yr) | 0.33% | -0.16% | 0.59% |
| Median age | 41.1 | 37.4 | 37.3 |
| Households | 12,549 | 5,035,584 | 130,235,071 |
Population in St. Charles grew by 6.0% from 2009 to 2024, reaching 31,856 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in St. Charles is Gen X, aged 45–60, at 23.6% of residents. That is 3.2 points above Illinois as a whole.
- Gen Z 13–28 6,755 21.2% on par
- Millennials 29–44 6,465 20.3% -1.6 pts
- Gen X 45–60 7,527 23.6% +3.2 pts
- Boomers 61–79 5,385 16.9% on par
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 49.7% of the people living in St. Charles and men 50.3%.
- Women 49.7% Illinois 50.6%
- Men 50.3% Illinois 49.4%
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Economy
St. Charles has a the economy index of A, which means it is very prosperous.
| Metric | St. Charles | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median household income | $110,703 | $84,042 | $80,455 |
| Income growth (%/yr) | 2.63% | 4.46% | 4.80% |
| Unemployment rate | 4.1% | 5.8% | 5.2% |
The median household income in St. Charles is about 32% higher than in Illinois.
Housing
| Metric | St. Charles | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median home price | $162,898 | $149,936 | $248,835 |
| Median rent | $1,806 | $1,274 | $1,407 |
| Homeownership rate | 69.8% | 67.1% | 65.2% |
The median home price in St. Charles is about 7.5 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,806 per month for that long.
Commute Time & Mobility
Commuters in St. Charles spend about 44 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 182 hours, about 7.6 full days, spent commuting.
| Metric | St. Charles | Illinois Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 21.8 | 23.6 | 22.4 |
| Round-trip commute (min) | 43.6 | 47.3 | 44.8 |
| Yearly time spent (hours) | 182 | 197 | 187 |
| Estimated yearly cost | $5,636 | $6,104 | $5,790 |
| Work from home | 15.0% | 15.9% | 15.0% |
| Highway traffic (vehicles/day) | — | 7,977 | 8,813 |
| Local road traffic (vehicles/day) | 3,834 | 1,547 | 1,355 |
The average commute time in St. Charles is 22 minutes, shorter 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
St. Charles has a education index of A+, which means it is exceptionally educated.
| Metric | St. Charles | Illinois Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 47.9% | 34.1% | 31.6% |
| Average household size | 2.49 | 2.46 | 2.53 |
Health
St. Charles has a health index of A, which means it is very healthy.
| Metric | St. Charles | Illinois Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 81.3 | 77.9 | 78.3 |
| Self-rated poor health | 10.0% | 15.6% | 16.3% |
| Smokers | 12.6% | 19.2% | 19.0% |
St. Charles, IL Compared With Nearby Cities
How St. Charles, IL compares with the 2 cities closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| St. Charles, IL | 31,856 | $110,703 #2/3 | $162,898 #3/3 | 21.8 min #2/3 |
| Batavia, IL | 22,110 | $120,407 | $329,795 | 23.7 min |
| West Chicago, IL | 21,065 | $95,968 | $283,168 | 21.6 min |
Frequently Asked Questions
Common questions about St. Charles, Illinois.
What is the population of St. Charles, Illinois?
About 31,856 people live in St. Charles, Illinois, in 12,549 households of 2.5 people on average. The median age is 41.1, so residents are older than the U.S. median of 37.3 by about 4 years.
Is St. Charles, Illinois mostly urban or rural?
Averaged over its land area, St. Charles, Illinois has 2,116 people per square mile, a density typical of urban and suburban areas. That is about 24 times the U.S. average of 86.
How affordable is housing in St. Charles, Illinois?
The median home costs 1.5 times the median household income ($162,898 against $110,703), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,806 a month takes about 20% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is unemployment high in St. Charles, Illinois?
Unemployment in St. Charles, Illinois is only 4.1%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How educated are people in St. Charles, Illinois?
47.9% of adults in St. Charles, Illinois hold a bachelor's degree or higher (about 1 in 2), well above the U.S. share of 31.6%.
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