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, Massachusetts at Route 27 to the north and Route 123 to the south. The two routes pass through the center of the city, crossing at that point. Massachusetts Route 28 passes from north to south through the center of the city, The western end of Route 14 (at its intersection with Route 27) and the southern end of Route 37 (at its intersection with Route 28) both are in the city. Brockton has its own bus services, operated by the Brockton Area Transit Authority (BAT). Each bus has a designated route running through a section of Brockton, i.e. Montello, Campello, Cary