Belleville is a city located in St. Clair County Illinois. It is also the county seat of St. Clair County. With a 2020 population of 41,990, it is the 37th largest city in Illinois and the 1062nd largest city in the United States. Belleville is currently declining at a rate of -0.49% annually and its population has decreased by -0.98% since the most recent census, which recorded a population of 42,404 in 2020. Spanning over 23 miles, Belleville has a population density of 1,808 people per square mile.
The average household income in Belleville is $62,548 with a poverty rate of 11.88%. The median rental costs in recent years comes to $817 per month, and the median house value is $97,500. The median age in Belleville is 36.9 years, 36 years for males, and 38.4 years for females.
According to the most recent ACS, the racial composition of Bellevillewas:
Rate of Home Ownership
Average Family Size
Average Household Size
The highest rate of high school graduation is among islander people with a rate of 100.00%.
The highest rate of bachelors degrees is among asian people with a rate of 60.61%.
95.60% of Belleville residents speak only English, while 4.40% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.02% of the population.
Overall Poverty Rate
Male Poverty Rate
Female Poverty Rate
The race most likely to be in poverty in Belleville is Black, with 23.36% below the poverty level.
The race least likely to be in poverty in Belleville is Other, with NaN% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 3.51%. Among those working part-time, it was 18.69%, and for those that did not work, the poverty rate was 20.96%.
Number of Veterans
Veteran Poverty Rate
Veteran Disability Rate
Labor Force Participation
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Born in Belleville
97.63% of Belleville residents were born in the United States, with 63.51% having been born in Illinois. 1.22% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.