Millbrook
- County:
- Elmore County
- County Seat:
- No
- Area (mi²):
- 14.324
- State:
- Alabama
Millbrook is a city located in Elmore County, Alabama. Millbrook has a 2026 population of 17,392. Millbrook is currently growing at a rate of 0.57% annually and its population has increased by 5.25% since the most recent census, which recorded a population of 16,525 in 2020.