Brockton High School, established in 1870, is a high school located in Brockton, Massachusetts. It is a part of Brockton Public Schools. As of 2016 Brockton High School, with 4,250 students, is one of the largest high schools in the United States and the largest high school in Massachusetts. Although widely stated by locals to be the largest high school East of the Mississippi River, it is in fact false, as this title is currently held by Brooklyn Technical High School in New York City.