| City : | Monticello City |
| County : | Piatt County |
| State : | Illinois (IL) |
| Land Area : | 3.80 sq mi |
| Water Area : | 0.03 sq mi |
| Latitude : | 40.0335450 |
| Longitude : | -88.5741111 |
| Population (2010): | 5,548 |
| Population Estimate (2012) : | 5,297 |
| Population Density : | 1,459.10/sq mi |
| Housing Units (2012) : | 2,492 |
| Median Household Income (2012) : | $64,269 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $80,366 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $151,200 (Illinois : $190,800, USA : $181,400) |
Monticello City Zip Codes
| 61856 (7,433) |