Preston township
- County:
- Brookings County
- County Seat:
- No
- Area (mi²):
- 35.442
- State:
- South Dakota
Preston township is located in Brookings County, South Dakota. Preston township has a 2026 population of 163. Preston township is currently growing at a rate of 0.62% annually and its population has increased by 5.84% since the most recent census, which recorded a population of 154 in 2020.
The median age in Preston township is 50.4 years: 50.3 years for males, and 50.5 years for females. For every 100 females there are 160.9 males.