Mountain Brook is a city in southeastern Jefferson County, Alabama, and a suburb of Birmingham. According to the 2010 census, the population of the city is 20,413. Mountain Brook is a particularly affluent city within the Birmingham metropolitan area and has appeared in several lists of America's wealthiest communities. Mountain Brook has been listed as one of the 10 wealthiest communities in the United States based on a 2008 survey that calculates wealth above the regular census limit.