Editing Mountain Brook, Alabama (section)

===2010 census===
As of the census of 2010, there were 20,413 people, 7,731 households, and 5,864 families residing in the city. The population density was {{convert|1,673.2|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 8,266 housing units at an average density of {{convert|675.8|/sqmi|/km2|sp=us|adj=off}}. The racial makeup of the city was 97.2% White, 1.0% Black or African American, 0.1% Native American, 0.9% Asian, 0.0% Pacific Islander, 0.2% from other races, and 0.6% from two or more races. 1.0% of the population were Hispanic or Latino of any race.

There were 7,731 households, out of which 37.7% had children under the age of 18 living with them, 68.2% were married couples living together, 6.4% had a female householder with no husband present, and 24.1% were non-families. 22.0% of all households were made up of individuals, and 9.9% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.12.

29.3% of the population was under the age of 18, 4.5% was from 18 to 24, 20.8% from 25 to 44, 29.7% from 45 to 64, and 15.7% was 65 years of age or older. The median age was 41.9 years. For every 100 females, there were 89.7 males. For every 100 females age 18 and over, there were 85.4 males.

The median income for a household was $130,721, and the median income for a family was $164,750. Males had a median income of $124,224 versus $54,420 for females. The per capita income for the city was $76,763. 1.8% of families and 3.7% of individuals were below the poverty line, including 2.1% of individuals under 18 and 2.5% of those 65 and over.

According to a list compiled in 2008 by Stephen Higley, it is the ninth wealthiest community in the United States.<ref>{{cite news |first=Joe B. |last=Crowe |url=http://blog.al.com/spotnews/2008/12/mountain_brook_one_of_us_wealt.html |title=Mountain Brook one of wealthiest communities in U.S. |date=December 30, 2008 |newspaper=The Birmingham News |type=blog }}</ref> It is often referred to as "The Tiny Kingdom" due to its high concentration of the region's business and professional leaders,<ref>{{cite book |last=Eskew |first=Glenn T. |title=But for Birmingham: The Local and National Movements in the Civil Rights Struggle |year=1997  |publisher=The University of North Carolina Press |isbn=0-8078-4667-8 |page=183 |chapter=Businessmen's Reform}}</ref> and the disparity of wealth between it and Birmingham where according to census data nearly a quarter of the population lives below the poverty line.