what county is brentwood tennessee
Brentwood, Tennessee. Brentwood is a suburb of Nashville, Tennessee; located in both Williamson County and Davidson County, it is known for its rolling hills as well as being one of the wealthiest cities in America relative to average cost of living. The population was 37,060 as of the 2010 U.S. Census, and estimated at 40,982 in 2014.