Northwestern High School is a public comprehensive and magnet high school located in Hyattsville, Maryland, United States, a suburb of Washington, D.C. It is part of the Prince George's County Public Schools system. Northwestern is located on Adelphi Road, less than a mile away from the University of Maryland, College Park. The school first opened in 1951. In 2000, the original building was demolished and replaced with the current facility, which has 386,000 square feet (35,900 m2) of land and a capacity of 2,700 students. Northwestern is the second-largest high school in the state of Maryland when measured by total square footage.