Twin Brooks
- County:
- Grant County
- County Seat:
- No
- Area (mi²):
- 0.406
- State:
- South Dakota
Twin Brooks is a town located in Grant County, South Dakota. Twin Brooks has a 2026 population of 47. Twin Brooks is currently growing at a rate of 2.17% annually and its population has increased by 2.17% since the most recent census, which recorded a population of 46 in 2020.
The median age in Twin Brooks is 55.8 years: 54.5 years for males, and 58.5 years for females. For every 100 females there are 141.7 males.