Belleville is a city located in the county of St. Clair in Illinois. Located at an elevated height of about 515 ft. above the ground, Belleville covers a total area of about 60 sq. kms. There are quite a few buildings registered as the National Register of Historical Places. This brings in a substantial number of tourists in the area. Entertainment also helps in bringing in visitors in the area. A part of the local population is engaged with education and the healthcare sector.