| Zip Code : | 51247 |
| City : | Rock Valley city |
| County : | Lyon County, Sioux County |
| State : | Iowa (IA) |
| | |
| Land Area : | 111.72 sq mi |
| Water Area : | 0.12 sq mi |
| Latitude : | 43.1937518 |
| Longitude : | -96.3381265 |
| | |
| Population (2010): | 4,870 |
| Population Estimate (2012) : | 4,721 |
| Population Density : | 43.59/sq mi |
| Housing Units (2012) : | 1,839 |
| Median Household Income (2012) : | $50,077 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $60,884 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $128,000 (Iowa : $123,000, USA : $181,400) |