| Zip Code : | 61071 |
| City : | Nelson village, Rock Falls city |
| County : | Whiteside County, Lee County |
| State : | Illinois (IL) |
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| Land Area : | 71.13 sq mi |
| Water Area : | 2.10 sq mi |
| Latitude : | 41.7246734 |
| Longitude : | -89.6988673 |
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| Population (2010): | 14,381 |
| Population Estimate (2012) : | 14,393 |
| Population Density : | 202.17/sq mi |
| Housing Units (2012) : | 6,397 |
| Median Household Income (2012) : | $40,079 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $49,258 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $87,400 (Illinois : $190,800, USA : $181,400) |