Mountain Brook is a city located in Alabama. With a 2020 population of 20,145, it is the 33rd largest city in Alabama and the 1839th largest city in the United States . Mountain Brook is currently declining at a rate of -0.38% annually and its population has decreased by -1.31% since the most recent census, which recorded a population of 20,413 in 2010. Mountain Brook reached it's highest population of 20,648 in 2014. Spanning over 13 miles, Mountain Brook has a population density of 1,571 people per square mile.
The average household income in Mountain Brook is $238,595 with a poverty rate of 3.04%. The median rental costs in recent years comes to $1,561 per month, and the median house value is $628,800. The median age in Mountain Brook is 40.4 years, 39.5 years for males, and 41.3 years for females.