Brockton, Massachusetts Library system. The main library is a Carnegie building and is located at 304 Main Street, and there are two branch libraries. Brockton, Massachusetts Brockton is a city in Plymouth County, Massachusetts, United States; the population was 95,314 in the 2015 Census. Brockton, along with Plymouth, are the county seats of Plymouth County. Brockton is the seventh largest city in Massachusetts and is sometimes referred to as the "City of Champions", due to the success of native boxers Rocky Marciano and Marvin Hagler, as well as its successful Brockton High School sports programs. Two of the villages within the city
Brockton High School Brockton High School 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. Brockton High School's colors are Black & Red and their mascot is