The Brentwood Borough School District is located within Allegheny County and covers a 1.4 square mile area. Brentwood is a walking district and accommodates students in kindergarten through twelfth grades. The District offers a full-day kindergarten and houses elementary students in both Moore and Elroy elementary schools. Middle and High School students attend the Brentwood Middle/High School.

The school district was founded in 1915 with classes held in the building that is now known as Moore Elementary School. Elroy School was erected and officially opened its doors in the fall of 1921. In 1925 both Moore and Elroy buildings were enlarged with additional renovations completed in 1997 and 2020.

The Brentwood High School building was built in 1932, with renovations in 1940, 1959, 1972 (which included construction of the current Activity Building), and 2001 (which included construction of the High School Annex building).

Brentwood has always been a walking district and has an average student enrollment of 1,250 students/year.