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 age in Lake Flat township is 15.1 years: 14.9 years for males, and 25.8 years for females. For every 100 females there are 246.2 males.
Data after 2023 is projected based on recent change
The racial composition of Lake Flat township includes 93.33% White, and smaller percentages for and multiracial populations.
White (93.33%)
Two or more races (6.67%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 42 | 93.33% |
| Two or more races | 3 | 6.67% |
Married
Widowed
Divorced
Separated
Never Married