Riverside township
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 35.999
- State:
- South Dakota
Riverside township is located in Brown County, South Dakota. Riverside township has a 2026 population of 61. Riverside township is currently declining at a rate of -1.61% annually and its population has decreased by -4.69% since the most recent census, which recorded a population of 64 in 2020.
The median age in Riverside township is 62.7 years: 0 years for males, and 62.4 years for females. For every 100 females there are 111.4 males.