| City : | Decatur City |
| County : | Macon County |
| State : | Illinois (IL) |
| Land Area : | 42.22 sq mi |
| Water Area : | 4.69 sq mi |
| Latitude : | 39.8559828 |
| Longitude : | -88.9337462 |
| Population (2010): | 76,122 |
| Population Estimate (2012) : | 76,091 |
| Population Density : | 1,802.82/sq mi |
| Housing Units (2012) : | 36,134 |
| Median Household Income (2012) : | $39,635 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $49,975 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $80,100 (Illinois : $190,800, USA : $181,400) |