St. Charles, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of St. Charles, Illinois is 32,733 as of the 2023 American Community Survey, making it the 57th-largest city in Illinois. The median household income is $115,350, the median home value is $369,700, and the median age is 41.6.
The population has grown 3.5% since 2010 (32,335 → 33,482).
32,733
Population
2264
People / sq mi
$115,350
Median Income
$369,700
Median Home Value
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St. Charles covers 14.5 sq mi of land at 2264 people per square mile.
About St. Charles, IL
The poverty rate is what most separates St. Charles from the typical city: 1.3% of residents live below the federal poverty line, against 12.4% nationally. St. Charles is a city in Illinois with a population of 32,733.
Median household income is $115,350, above the US median of $78,538. Very few residents live in poverty — 1.3%, below the national 12.4%. Median home value is $369,700, with typical rent around $1,788.
About 51.2% of adults 25 and older have a bachelor’s degree, above the 35.0% national figure. About 14.5% of the workforce is home-based, close to the national 14.0%, and the average commute runs about 29 minutes each way.
St. Charles city Population History (2010-2024)
The city of St. Charles city had a population of 32,335 in 2010 and 33,482 in 2024, a 3.5% growth over 14 years. The peak was 33,482 in 2024. Average annual growth rate: 0.25%.
33,482
Population (2024)
32,335
Population (2010)
33,482
Peak (2024)
0.25%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 32,335 |
| 2011 | 32,464 |
| 2012 | 32,517 |
| 2013 | 32,518 |
| 2014 | 32,604 |
| 2015 | 32,651 |
| 2016 | 32,612 |
| 2017 | 32,547 |
| 2018 | 32,917 |
| 2019 | 32,887 |
| 2020 | 33,084 |
| 2021 | 33,097 |
| 2022 | 32,849 |
| 2023 | 32,850 |
| 2024 | 33,482 |
Race & Ethnicity
| White | 79.5% |
| Black or African American | 3.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.1% |
| Two or More Races | 0.0% |
Economy & Income
$115,350
Median Household Income
$59,651
Per Capita Income
1.3%
Poverty Rate
3.2%
Unemployment Rate
Housing
$369,700
Median Home Value
$1,788
Median Rent
70.3%
Owner-Occupied
Education
94.7%
High School+
51.2%
Bachelor's+
Commute
2.3%
Drive Alone
72.9%
Public Transit
14.5%
Work From Home
28.6 min
Avg Commute
Community Profile
18.2%
Foreign Born
83.3%
Non-English at Home
4.4%
Veterans
9.0%
With Disability
95.7%
Health Insurance
97.3%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 23.9% |
| Manufacturing | 13.8% |
| Education, Health Care & Social Services | 11.4% |
| Finance, Insurance & Real Estate | 10.5% |
| Information | 6.3% |
| Retail Trade | 5.2% |
| Arts, Entertainment & Food Services | 5.0% |
| Construction | 4.9% |
| Public Administration | 4.9% |
| Transportation & Warehousing | 1.8% |
| Agriculture & Mining | 0.1% |
Largest cities in Illinois
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City rankings
Frequently Asked Questions
St. Charles, Illinois has a population of 32,733 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 57th-largest city in Illinois.
The median household income in St. Charles, Illinois is $115,350, with 1.3% of residents living below the federal poverty level.
The median home value in St. Charles, Illinois is $369,700, with median monthly rent at $1,788 and a homeownership rate of 70.3%.
The median age in St. Charles, Illinois is 41.6 years. The population is 51.3% male and 48.7% female.
The population has grown 3.5% since 2010 (32,335 → 33,482).
St. Charles city, IL Climate
St. Charles city, IL has an average annual temperature of 9.3°C (49°F) and receives about 931 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.3°C
Avg Temp
931
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -6° / 21° | 40 mm |
| February | -3° / 26° | 33 mm |
| March | 3° / 37° | 63 mm |
| April | 9° / 48° | 96 mm |
| May | 15° / 59° | 92 mm |
| June | 20° / 69° | 107 mm |
| July | 23° / 73° | 100 mm |
| August | 22° / 71° | 105 mm |
| September | 18° / 64° | 99 mm |
| October | 11° / 52° | 64 mm |
| November | 4° / 39° | 76 mm |
| December | -3° / 26° | 56 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit St. Charles city, IL
The most comfortable months to visit St. Charles city, IL are typically June, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -11°C low). June is usually the wettest month.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.