Millbrook is a city located in Elmore County Alabama. With a 2020 population of 16,040, it is the 37th largest city in Alabama and the 2219th largest city in the United States . Millbrook is currently growing at a rate of 0.45% annually and its population has increased by 9.56% since the most recent census, which recorded a population of 14,640 in 2010. Millbrook reached it's highest population of 16,040 in 2021. Spanning over 14 miles, Millbrook has a population density of 1,144 people per square mile.
The average household income in Millbrook is $80,780 with a poverty rate of 11.75%. The median rental costs in recent years comes to $951 per month, and the median house value is $154,300. The median age in Millbrook is 35.4 years, 33.6 years for males, and 36 years for females.