 About 9.8% of families and 13.6% of the population were below the poverty line, including 22.0% of those under age 18 and 2.3% of those age 65 or over.Prince George's County Police Department District 1 Station in Hyattsville serves Brentwood.Brentwood's government system is composed of an elected mayor and four council members, who are all elected at-large.