| City : | Duncan |
| County : | Hancock County |
| State : | Iowa (IA) |
| Land Area : | 0.79 sq mi |
| Water Area : | 0.01 sq mi |
| Latitude : | 43.1081563 |
| Longitude : | -93.7046735 |
| Population (2010): | 131 |
| Population Estimate (2012) : | 104 |
| Population Density : | 166.79/sq mi |
| Housing Units (2012) : | 35 |
| Median Household Income (2012) : | $13,750 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $0 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $42,500 (Iowa : $123,000, USA : $181,400) |