Lake township
- County:
- Aurora County
- County Seat:
- No
- Area (mi²):
- 34.185
- State:
- South Dakota
Lake township is located in Aurora County, South Dakota. Lake township has a 2026 population of 54. Lake township is currently declining at a rate of -1.82% annually but its population has increased by 3.85% since the most recent census, which recorded a population of 52 in 2020.
The median household income in Lake township is $107,500 with a poverty rate of 18.07%. The median age in Lake township is 31.3 years: 31.5 years for males, and 17.9 years for females. For every 100 females there are 107.5 males.