Brothersfield township
- County:
- Turner County
- County Seat:
- No
- Area (mi²):
- 28.453
- State:
- South Dakota
Brothersfield township is located in Turner County, South Dakota. Brothersfield township has a 2026 population of 183. Brothersfield township is currently growing at a rate of 1.67% annually and its population has increased by 5.78% since the most recent census, which recorded a population of 173 in 2020.
The median age in Brothersfield township is 50.5 years: 48.9 years for males, and 50.6 years for females. For every 100 females there are 62.1 males.