Brentwood is an inner-ring suburb of St. Louis, located in St. Louis County, Missouri. The population was 7,693 at the 2000 census. Brentwood is home to Brentwood High School, a National Blue Ribbon Award winner 2006 and Mark Twain Elementary School, a National Blue Ribbon Award winner 2009.
Brentwood is located at 38°37′9″N 90°20′55″W / 38.61917°N 90.34861°W / 38.61917; -90.34861 (38.619102, -90.348715).
According to the United States Census Bureau, the city has a total area of 2.0 square miles (5.1 km²), all of it land.