Brentwood is located in Rockingham county New hampshire with a geographic area of square miles. The total population in Brentwood is 4,596 with 55.2% male and 44.8% female. Children under age 5 represent 6.5% of the population, under age 18 equal 25.5% of the population and over age 65 is 14.2% of the population. The median household income is $143,538, per capita income is $54,898. There are a total of 1,541 housing units with 91.0% owner occupied. Education includes 14.2% of residents that are high school graduates and 59.0% with a bachelor's degree or higher. The average temperature in Brentwood in the summer is 68 degrees, and in the winter 23 degrees.
