Mullen township
- County:
- Jones County
- County Seat:
- No
- Area (mi²):
- 36.093
- State:
- South Dakota
Mullen township is located in Jones County, South Dakota. Mullen township has a 2026 population of 5. Mullen township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 5 in 2020.