Barrett
- County:
- Beadle County
- County Seat:
- No
- Area (mi²):
- 35.888
- State:
- South Dakota
Barrett is located in Beadle County, South Dakota. Barrett has a 2025 population of 105 . Barrett is currently growing at a rate of 0.96% annually and its population has decreased by 0% since the most recent census, which recorded a population of 105 in 2020.
The median age in Barrett is 32.8 years: 33.3 years for males, and 32.5 years for females. For every 100 females there are 193.5 males.