Belleville, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Belleville, Illinois is 41,722 as of the 2023 American Community Survey, making it the 37th-largest city in Illinois. The median household income is $60,529, the median home value is $131,000, and the median age is 38.3.
The population has declined 8.4% since 2010 (44,288 → 40,560).
41,722
Population
1795
People / sq mi
$60,529
Median Income
$131,000
Median Home Value
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Belleville covers 23.2 sq mi of land at 1795 people per square mile.
About Belleville, IL
Housing cost is the defining feature of Belleville: the median home is valued at $131,000. Belleville is a city in Illinois with a population of 41,722. It ranks #37 among cities in Illinois by population.
Incomes run on the lower side: a median household income of $60,529, below the US median of $78,538. About 8.9% of residents live below the federal poverty level, below the national 12.4%. Home prices sit near the bottom of the range at $131,000, with typical rent around $947.
28.0% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Remote work is below the national 14.0% at 11.0%, and the average commute runs about 26 minutes each way.
Belleville city Population History (2010-2024)
The city of Belleville city had a population of 44,288 in 2010 and 40,560 in 2024, a -8.4% growth over 14 years. The peak was 44,288 in 2010. Average annual growth rate: -0.62%.
40,560
Population (2024)
44,288
Population (2010)
44,288
Peak (2010)
-0.62%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 44,288 |
| 2011 | 43,922 |
| 2012 | 43,503 |
| 2013 | 43,036 |
| 2014 | 42,679 |
| 2015 | 42,235 |
| 2016 | 41,873 |
| 2017 | 41,683 |
| 2018 | 41,341 |
| 2019 | 40,897 |
| 2020 | 42,278 |
| 2021 | 41,844 |
| 2022 | 41,315 |
| 2023 | 40,876 |
| 2024 | 40,560 |
Race & Ethnicity
| White | 57.8% |
| Black or African American | 32.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.3% |
| Two or More Races | 0.1% |
Economy & Income
$60,529
Median Household Income
$33,315
Per Capita Income
8.9%
Poverty Rate
3.4%
Unemployment Rate
Housing
$131,000
Median Home Value
$947
Median Rent
61.0%
Owner-Occupied
Education
94.5%
High School+
28.0%
Bachelor's+
Commute
3.6%
Drive Alone
76.1%
Public Transit
11.0%
Work From Home
25.9 min
Avg Commute
Community Profile
32.1%
Foreign Born
96.2%
Non-English at Home
9.2%
Veterans
14.0%
With Disability
94.1%
Health Insurance
92.4%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 25.6% |
| Manufacturing | 10.2% |
| Education, Health Care & Social Services | 10.0% |
| Finance, Insurance & Real Estate | 9.7% |
| Retail Trade | 8.8% |
| Information | 6.9% |
| Construction | 5.1% |
| Public Administration | 4.9% |
| Arts, Entertainment & Food Services | 3.7% |
| Transportation & Warehousing | 1.4% |
| Agriculture & Mining | 0.8% |
Largest cities in Illinois
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Part of Illinois
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City rankings
Frequently Asked Questions
Belleville, Illinois has a population of 41,722 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 37th-largest city in Illinois.
The median household income in Belleville, Illinois is $60,529, with 8.9% of residents living below the federal poverty level.
The median home value in Belleville, Illinois is $131,000, with median monthly rent at $947 and a homeownership rate of 61.0%.
The median age in Belleville, Illinois is 38.3 years. The population is 47.4% male and 52.6% female.
The population has declined 8.4% since 2010 (44,288 → 40,560).
Belleville city, IL Climate
Belleville city, IL has an average annual temperature of 12.9°C (55°F) and receives about 974 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
12.9°C
Avg Temp
974
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 29° | 52 mm |
| February | 1° / 34° | 59 mm |
| March | 7° / 45° | 88 mm |
| April | 13° / 55° | 95 mm |
| May | 19° / 65° | 103 mm |
| June | 24° / 74° | 95 mm |
| July | 26° / 78° | 94 mm |
| August | 25° / 76° | 81 mm |
| September | 21° / 69° | 84 mm |
| October | 14° / 57° | 69 mm |
| November | 7° / 45° | 80 mm |
| December | 1° / 34° | 74 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 Belleville city, IL
The most comfortable months to visit Belleville city, IL are typically September, June and May, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 32°C high). The coldest is January (near -6°C low). May 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.