
Lake Poinsett
- County:
- Brookings County
- County Seat:
- No
- Area (mi²):
- 4.888
- State:
- South Dakota
Lake Poinsett is a CDP located in Brookings County, South Dakota. Lake Poinsett has a 2025 population of 424. Lake Poinsett is currently declining at a rate of -1.17% annually and its population has decreased by -11.67% since the most recent census, which recorded a population of 480 in 2020.
The average household income in Lake Poinsett is $112,224 with a poverty rate of 6.05%. The median age in Lake Poinsett is 58.2 years: 59 years for males, and 55.2 years for females.