| County : | Rock Island County |
| State : | Illinois (IL) |
| Land Area : | 427.63 sq mi |
| Water Area : | 23.65 sq mi |
| Latitude : | 41.4684044 |
| Longitude : | -90.5722031 |
| Population (2010): | 147,546 |
| Population Estimate (2012) : | 147,504 |
| Population Density : | 345.03/sq mi |
| Housing Units (2012) : | 65,756 |
| Median Household Income (2012) : | $48,205 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $61,413 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $114,000 (Illinois : $190,800, USA : $181,400) |
Rock Island County Cities / Towns
| Andalusia Village (1,178) | Carbon Cliff Village (2,134) | Coal Valley Village (3,743) |
| Cordova Village (672) | Coyne Center (827) | East Moline City (21,302) |
| Hampton Village (1,863) | Hillsdale Village (523) | Milan Village (5,099) |
| Moline City (43,483) | Oak Grove Village (396) | Port Byron Village (1,647) |
| Rapids City Village (959) | Reynolds Village (539) | Rock Island City (39,018) |
| Rock Island Arsenal (149) | Silvis City (7,479) |
Rock Island County Zip Codes
| 61201 (39,116) | 61232 (1,284) | 61236 (193) |
| 61239 (1,219) | 61240 (5,870) | 61242 (1,145) |
| 61244 (24,053) | 61256 (1,822) | 61257 (1,210) |
| 61259 (1,276) | 61260 (856) | 61264 (10,548) |
| 61265 (45,099) | 61272 (1,504) | 61273 (3,316) |
| 61275 (4,347) | 61278 (412) | 61279 (1,061) |
| 61281 (2,597) | 61282 (7,809) | 61284 (2,292) |