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 2026 population of 39,701. It is also the county seat of St. Clair County. Belleville is currently declining at a rate of -1.07% annually and its population has decreased by -6.1% since the most recent census, which recorded a population of 42,278 in 2020.

The median household income in Belleville is $63,535 with a poverty rate of 14.65%. The median age in Belleville is 39.1 years: 38.6 years for males, and 39.6 years for females. For every 100 females there are 86.8 males.

39.7K
Total Population
1,709
Density (mi²)
-429 -1.07%
Growth

Belleville Population

Belleville Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202639,701-429-1.07%
202540,130-430-1.06%
202440,560-316-0.77%
202340,876-439-1.06%
202241,315-529-1.26%
202141,844-434-1.03%
202042,278-108-0.25%
201940,885-454-1.1%
201841,339-341-0.82%
201741,680-189-0.45%
201641,869-338-0.8%
201542,207-436-1.02%
201442,643-354-0.82%
201342,997-459-1.06%
201243,456-417-0.95%
201143,873-357-0.81%
201044,230-248-0.56%
200041,410-1,375-3.21%
199042,7851,2052.9%
198041,5803570.87%
197041,2233,95910.62%
196037,2644,54313.88%
195032,7214,31615.19%
194028,405-20-0.07%
193028,4253,60214.51%
192024,8233,70117.52%
191021,1223,63820.81%
190017,4842,12313.82%
189015,3614,67843.79%
188010,6832,53731.14%
18708,1466268.32%
18607,5204,579155.7%
18502,94100%

Median Age

Overall: 39.1 years
Female: 39.6 years
Male: 38.6 years

Belleville Adults

There are 32,041 adults, (6,768 of whom are seniors) in Belleville.

Sex Ratio

Female: 22,151 (53.5%)
Male: 19,219 (46.5%)

Demographics

The racial composition of Belleville includes 56.97% White, 32.56% Black or African American, and smaller percentages for other race, Asian, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White23,56756.97%
Black or African American13,47032.56%
Two or more races3,3047.99%
Other race5151.24%
Asian4431.07%
Native Hawaiian or Pacific Islander490.12%
Native American220.05%
Race
Population ↓
Percentage (of total)
Two or more races7001.69%
Other race3530.85%
White1120.27%
Asian150.04%
Native Hawaiian or Pacific Islander150.04%
Black or African American130.03%
Race
Population ↓
Percentage (of total)
White23,45556.7%
Black or African American13,45732.53%
Two or more races2,6046.29%
Asian4281.03%
Other race1620.39%
Native Hawaiian or Pacific Islander340.08%
Native American220.05%

Belleville Marital Status

Economics and Income Statistics

Belleville 's average per capita income is $45,234. Household income levels show a median of $63,535. The poverty rate stands at 14.65%.

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$105,288-
Families$84,124$97,535
Households$63,535$78,601
Non Families$39,877$53,024

$45,234

Average Income

$63,535

Median Household Income

14.65%

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)