| City : | Olive Branch |
| County : | Alexander County |
| State : | Illinois (IL) |
| Land Area : | 9.64 sq mi |
| Water Area : | 0.01 sq mi |
| Latitude : | 37.1836828 |
| Longitude : | -89.3495061 |
| Population (2010): | 864 |
| Population Estimate (2012) : | 802 |
| Population Density : | 89.61/sq mi |
| Housing Units (2012) : | 433 |
| Median Household Income (2012) : | $40,515 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $42,353 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $76,900 (Illinois : $190,800, USA : $181,400) |