Lake Flat township
- County:
- Pennington County
- County Seat:
- No
- Area (mi²):
- 34.431
- State:
- South Dakota
Lake Flat township is located in Pennington County, South Dakota. Lake Flat township has a 2026 population of 32. Lake Flat township is currently declining at a rate of -3.03% annually and its population has decreased by 0% since the most recent census, which recorded a population of 32 in 2020.
The median household income in Lake Flat township is $111,042 with a poverty rate of 0%. The median age in Lake Flat township is 15.7 years: 15.3 years for males, and 25.6 years for females. For every 100 females there are 160.9 males.