City Brentwood is an affluent suburb of Nashville located in Williamson County, Tennessee. The population was 37,163 at the 2010 census. As of the 2000 Census, Brentwood had a land area of 35.4 square miles (92km2), but an annexation in 2001 increased the area to 40.8 square miles (106km2). As of the census of 2010, there were 37,060 people, comprising 11,791 households residing in the city. The population density was 676.7 inhabitants per square mile (261.3/km2). There were 12,577 housing units at an average density of 227.7 per square mile (87.9/km2). The racial makeup of the city was 90.0% Caucasian, 3.0% African American, 0.2% Native American, 5.0% Asian, and 1.6% from two or more races. Hispanic or Latino of any race were 2.1% of the population. Brentwood is Tennessee's best educated city, proportionately, with 98.4% of adult residents (25 and older) holding a high school diploma, and 68.4% of adults possessing a bachelor's degree or higher (2010 Census).