| City : | Rock Island City |
| County : | Rock Island County |
| State : | Illinois (IL) |
| | |
| Land Area : | 16.85 sq mi |
| Water Area : | 1.02 sq mi |
| Latitude : | 41.4729519 |
| Longitude : | -90.5851598 |
| | |
| Population (2010): | 39,018 |
| Population Estimate (2012) : | 38,808 |
| Population Density : | 2,316.12/sq mi |
| Housing Units (2012) : | 17,422 |
| Median Household Income (2012) : | $42,613 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $57,313 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $98,900 (Illinois : $190,800, USA : $181,400) |