| City : | Marble Rock City |
| County : | Floyd County |
| State : | Iowa (IA) |
| Land Area : | 0.83 sq mi |
| Water Area : | 0.04 sq mi |
| Latitude : | 42.9646078 |
| Longitude : | -92.8677718 |
| Population (2010): | 307 |
| Population Estimate (2012) : | 280 |
| Population Density : | 370.08/sq mi |
| Housing Units (2012) : | 150 |
| Median Household Income (2012) : | $37,500 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $46,719 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $58,200 (Iowa : $123,000, USA : $181,400) |
Marble Rock City Zip Codes
| 50653 (639) |