Belleville Flag

Belleville

County Seat:
Yes
Area (mi²):
23.233
State:
Illinois

Belleville is a city located in St. Clair County, Illinois. Belleville has a 2025 population of 40,130 . It is also the county seat of St. Clair County . Belleville is currently declining at a rate of -1.06% annually and its population has decreased by -5.08% since the most recent census, which recorded a population of 42,278 in 2020.

The average household income in Belleville is $77,293 with a poverty rate of 14.88%. The median age in Belleville is 38.3 years: 38.2 years for males, and 38.5 years for females. For every 100 females there are 90.1 males.

40.1K
Total Population
1,727
Density (mi²)
-430 -1.06%
Growth

Belleville Population

Belleville Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Belleville includes 57.77% White, 32.03% Black or African American, and smaller percentages for other race, Asian, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

White (57.77%)

Black or African American (32.03%)

Two or more races (7.6%)

Other race (1.47%)

Asian (0.88%)

Native Hawaiian or Pacific Islander (0.16%)

Native American (0.09%)

Race
Population
Percentage (of total)
White24,10357.77%
Black or African American13,36432.03%
Two or more races3,1727.6%
Other race6121.47%
Asian3670.88%
Native Hawaiian or Pacific Islander650.16%
Native American390.09%

Belleville Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Belleville's average per capita income is $42,111. Household income levels show a median of $60,529. The poverty rate stands at 14.88%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$101,728-
Families$81,264$95,792
Households$60,529$77,293
Non Families$37,344$52,271

$42,111

Average Income

$60,529

Median Household Income

14.88%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)