Duncan
- County:
- Bolivar County
- County Seat:
- No
- Area (mi²):
- 0.916
- State:
- Mississippi
Duncan is a town located in Bolivar County, Mississippi. Duncan has a 2026 population of 267. Duncan is currently declining at a rate of -2.55% annually and its population has decreased by -5.32% since the most recent census, which recorded a population of 282 in 2020.