Rusk township
- County:
- Day County
- County Seat:
- No
- Area (mi²):
- 35.244
- State:
- South Dakota
Rusk township is located in Day County, South Dakota. Rusk township has a 2026 population of 125. Rusk township is currently declining at a rate of 0% annually and its population has increased by 1.63% since the most recent census, which recorded a population of 123 in 2020.
The median age in Rusk township is 66.6 years: 66.5 years for males, and 66.7 years for females. For every 100 females there are 140.0 males.