| Zip Code : | 62864 |
| City : | Mount Vernon city |
| County : | Jefferson County |
| State : | Illinois (IL) |
| | |
| Land Area : | 145.16 sq mi |
| Water Area : | 0.64 sq mi |
| Latitude : | 38.3304926 |
| Longitude : | -88.9025195 |
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| Population (2010): | 24,108 |
| Population Estimate (2012) : | 24,305 |
| Population Density : | 166.08/sq mi |
| Housing Units (2012) : | 11,420 |
| Median Household Income (2012) : | $39,078 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $53,286 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $89,900 (Illinois : $190,800, USA : $181,400) |