Lake township
- County:
- Spink County
- County Seat:
- No
- Area (mi²):
- 33.252
- State:
- South Dakota
Lake township is located in Spink County, South Dakota. Lake township has a 2026 population of 97. Lake township is currently declining at a rate of -1.02% annually and its population has decreased by -3.96% since the most recent census, which recorded a population of 101 in 2020.
The median age in Lake township is 32.3 years: 34.2 years for males, and 32.2 years for females. For every 100 females there are 89.4 males.