Bridgewater is a city in Plymouth County, Massachusetts, United States. As of the 2020 U.S. census, the city's population was 28,633. The historic city center of Bridgewater is located approximately 25 miles (40 km) south of Boston, Massachusetts and approximately 35 miles east of Providence, Rhode Island. The town of Bridgewater was formerly a census-designated place (CDP) until 2010, when Bridgewater was granted city status. Today, Bridgewater is one of 13 municipalities in Massachusetts that have applied for and have been granted a city government while claiming "the town of" in their official names.