| City : | Belleville City |
| County : | St. Clair County |
| State : | Illinois (IL) |
| | |
| Land Area : | 22.74 sq mi |
| Water Area : | 0.27 sq mi |
| Latitude : | 38.5150676 |
| Longitude : | -89.9862282 |
| | |
| Population (2010): | 44,478 |
| Population Estimate (2012) : | 44,118 |
| Population Density : | 1,955.90/sq mi |
| Housing Units (2012) : | 21,099 |
| Median Household Income (2012) : | $48,085 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $61,239 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $109,500 (Illinois : $190,800, USA : $181,400) |