| Zip Code : | 61462 |
| City : | Monmouth city |
| County : | Henderson County, Warren County |
| State : | Illinois (IL) |
| | |
| Land Area : | 156.43 sq mi |
| Water Area : | 0.20 sq mi |
| Latitude : | 40.9232492 |
| Longitude : | -90.6443460 |
| | |
| Population (2010): | 11,643 |
| Population Estimate (2012) : | 11,499 |
| Population Density : | 74.43/sq mi |
| Housing Units (2012) : | 4,876 |
| Median Household Income (2012) : | $35,567 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $46,611 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $82,100 (Illinois : $190,800, USA : $181,400) |