Millbrook is a city located in New York. With a 2020 population of 1,389, it is the 368th largest city in New York and the 9006th largest city in the United States. Millbrook is currently declining at a rate of -0.29% annually and its population has decreased by -4.34% since the most recent census, which recorded a population of 1,452 in 2010. Millbrook reached it's highest population of 1,449 in 2010. Spanning over 2 miles, Millbrook has a population density of 747 people per square mile.
The average household income in Millbrook is $98,016 with a poverty rate of 8.35%. The median rental costs in recent years comes to $1,123 per month, and the median house value is $331,100. The median age in Millbrook is 48.7 years, 49 years for males, and 48.6 years for females. For every 100 females there are 76.7 males.