USA
> Duncan, OK Micro Area
| Metropolitan statistical area : | Duncan, OK Micro Area |
| Land Area : | 870.24 sq mi |
| Water Area : | 21.12 sq mi |
| Latitude : | 34.4813609 |
| Longitude : | -97.8556068 |
| Population (2010): | 45,048 |
| Population Estimate (2012) : | 44,848 |
| Population Density : | 51.77/sq mi |
| Housing Units (2012) : | 20,658 |
| Median Household Income (2012) : | $44,918 (USA : $53,046) |
| Median Family Income (2012) : | $55,800 (USA : $64,585) |
| Median House Price (2012) : | $86,300 (USA : $181,400) |