The Town of Watertown is a city in Middlesex County, Massachusetts, United States. It is part of the Greater Boston area. The population was 31,915 at the 2010 census. Watertown is one of fourteen Massachusetts municipalities that have applied for, and been granted, city forms of government but wish to retain “The town of” in their official names.
Watertown is made up of six neighborhoods: Bemis, Brigham (Brigham Historic District), Coolidge Square, East Watertown, Watertown Square and the West End.
Archeological evidence suggests that Watertown was inhabited for thousands of years before the arrival of settlers from England. Two tribes of Massachusett, the Pequossette and the Nonantum, had settlements on the banks of the river later called the Charles. The Pequossette built a fishing weir to trap herring at the site of the current Watertown Dam. The annual fish migration, as both alewife and blueback herring swim upstream from their adult home in the sea to spawn in the fresh water where they were hatched, still occurs every spring.