Grand River township
- County:
- Perkins County
- County Seat:
- No
- Area (mi²):
- 51.734
- State:
- South Dakota
Grand River township is located in Perkins County, South Dakota. Grand River township has a 2026 population of 18. Grand River 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 18 in 2020.
The median age in Grand River township is 76.3 years: 0 years for males, and 0 years for females. For every 100 females there are 218.8 males.