| City : | Keystone City |
| County : | Benton County |
| State : | Iowa (IA) |
| Land Area : | 0.45 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 41.9997178 |
| Longitude : | -92.1982870 |
| Population (2010): | 622 |
| Population Estimate (2012) : | 638 |
| Population Density : | 1,377.90/sq mi |
| Housing Units (2012) : | 280 |
| Median Household Income (2012) : | $51,875 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $65,500 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $88,700 (Iowa : $123,000, USA : $181,400) |
Keystone City Zip Codes
| 52249 (965) |