Millbrook
- County:
- Dutchess County
- County Seat:
- No
- Area (mi²):
- 1.86
- State:
- New York
Millbrook is a village located in Dutchess County, New York. Millbrook has a 2026 population of 1,445. Millbrook is currently declining at a rate of -0.14% annually and its population has decreased by -0.89% since the most recent census, which recorded a population of 1,458 in 2020.