Millbrook Colony
- County:
- Davison County
- County Seat:
- No
- Area (mi²):
- 0.234
- State:
- South Dakota
Millbrook Colony is a CDP located in Davison County, South Dakota. Millbrook Colony has a 2025 population of 15. Millbrook Colony is currently growing at a rate of 7.14% annually and its population has increased by 200% since the most recent census, which recorded a population of 5 in 2020.
The median age in Millbrook Colony is 67.3 years: 4.4 years for males, and 67.5 years for females.