Belleville is located in Illinois. Belleville, Illinois has population of 42,582. Belleville is less family-centric than the surrounding county with 26% of the households with children.
The median household income in Belleville, Illinois is $49,082. The median household income for the surrounding county is $59,624 compared to the national median of $66,222. The median age of people living in Belleville is 39.4 years.
The average high temperature in July is 89.6 degrees, with an average low temperature in January of 22.1 degrees. The annual precipitation is 39.37.