About the town » Brockton, Plymouth County, Massachusetts, United States

Brockton is a city in Plymouth County, Massachusetts, United States; the population was 93,810 in the 2010 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 the "City of Champions", mainly due to the success of native boxers Rocky Marciano and Marvin Hagler, as well as its successful Brockton High School sports programs.