| City : | Lake Petersburg |
| County : | Denton County, Menard County |
| State : | Illinois (IL) |
| | |
| Land Area : | 1.76 sq mi |
| Water Area : | 0.28 sq mi |
| Latitude : | 39.9827439 |
| Longitude : | -89.8670722 |
| | |
| Population (2010): | 719 |
| Population Estimate (2012) : | 778 |
| Population Density : | 407.83/sq mi |
| Housing Units (2012) : | 387 |
| Median Household Income (2012) : | $76,071 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $89,917 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $211,000 (Illinois : $190,800, USA : $181,400) |