| County : | Lyon County |
| State : | Iowa (IA) |
| Land Area : | 587.65 sq mi |
| Water Area : | 0.13 sq mi |
| Latitude : | 43.3835796 |
| Longitude : | -96.2072011 |
| Population (2010): | 11,581 |
| Population Estimate (2012) : | 11,623 |
| Population Density : | 19.71/sq mi |
| Housing Units (2012) : | 4,848 |
| Median Household Income (2012) : | $49,727 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $60,103 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $105,500 (Iowa : $123,000, USA : $181,400) |
Lyon County Cities / Towns
| Alvord City (196) | Doon City (577) | George City (1,080) |
| Inwood City (814) | Larchwood City (866) | Lester City (294) |
| Little Rock City (459) | Rock Rapids City (2,549) |
Lyon County Zip Codes
| 51201 (6,193) | 51230 (462) | 51232 (875) |
| 51235 (1,079) | 51237 (1,703) | 51239 (3,123) |
| 51240 (1,746) | 51241 (1,737) | 51242 (212) |
| 51243 (807) | 51246 (3,844) | 51247 (4,870) |