
Frederick township
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 34.807
- State:
- South Dakota
Frederick township is located in Brown County, South Dakota. Frederick township has a 2025 population of 46. Frederick township is currently declining at a rate of -2.13% annually and its population has decreased by -4.17% since the most recent census, which recorded a population of 48 in 2020.
The average household income in Frederick township is $90,671 with a poverty rate of 0%. The median age in Frederick township is 31.3 years: 31.1 years for males, and 32.4 years for females.