Troy township
- County:
- Day County
- County Seat:
- No
- Area (mi²):
- 33.901
- State:
- South Dakota
Troy township is located in Day County, South Dakota. Troy township has a 2026 population of 33. Troy township is currently declining at a rate of 0% annually and its population has increased by 3.13% since the most recent census, which recorded a population of 32 in 2020.
The median age in Troy township is 49.3 years: 49.5 years for males, and 23.8 years for females. For every 100 females there are 51.4 males.