Marshfield township
- County:
- Perkins County
- County Seat:
- No
- Area (mi²):
- 71.547
- State:
- South Dakota
Marshfield township is located in Perkins County, South Dakota. Marshfield township has a 2026 population of 36. Marshfield township is currently growing at a rate of 2.86% annually and its population has decreased by 0% since the most recent census, which recorded a population of 36 in 2020.
The median age in Marshfield township is 57.3 years: 36.8 years for males, and 57.5 years for females. For every 100 females there are 137.5 males.