Duncan
- County:
- Hancock County
- County Seat:
- No
- Area (mi²):
- 0.785
- State:
- Iowa
Duncan is a CDP located in Hancock County, Iowa Iowa. Unfortunately, the data for this location is currently limited or unavailable.
The median age in Duncan is 55.4 years: 29 years for males, and 0 years for females. For every 100 females there are 925.0 males.