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 Area Transit Authority Brockton Area Transit Authority Brockton Area Transit Authority (BAT) is a public, non-profit organization in Massachusetts, charged with providing public transportation to the Brockton area, consisting of the city of Brockton and the adjoining towns of Abington, Avon, Bridgewater, East Bridgewater, Easton, Stoughton, Canton, West Bridgewater and Whitman. BAT provides fixed route bus services and paratransit services within its area. BAT's buses provide interchange with each other and with the Middleborough/Lakeville commuter rail line of the Massachusetts Bay Transportation Authority (MBTA) at Brockton station. BAT also runs a fixed route bus service from Brockton to Ashmont station on MBTA's Red