Suffolk County, Massachusetts

Suffolk County
County
Suffolk County Courthouse
Seal
Location within the U.S. state of Massachusetts
Massachusetts's location within the U.S.
Coordinates: 42°20′06″N 71°04′25″W / 42.334949°N 71.073494°W / 42.334949; -71.073494
Country	United States
State	Massachusetts
Founded	May 10, 1643
Named for	Suffolk
Seat	Boston
Largest city	Boston
Area
• Total	120 sq mi (300 km2)
• Land	58.15 sq mi (150.6 km2)
• Water	62 sq mi (160 km2)  52%
Population  (2020)
• Total	797,936
• Density	13,698/sq mi (5,289/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional districts	5th, 7th, 8th

Suffolk County (/ˈsʌfək/ SUF-ək) is located in the Commonwealth of Massachusetts, in the United States. As of the 2020 census, the population was 797,936,^[1] making it the fourth-most populous county in Massachusetts.^[2] The county comprises the cities of Boston, Chelsea, and Revere, and the town of Winthrop.^[3] The traditional county seat is Boston, the state capital and the largest city in Massachusetts.^[4] The county government was abolished in 1999, resulting in Suffolk County now functioning only as an administrative subdivision of state government and a set of communities grouped together for some statistical purposes. Suffolk County is located at the core of the Boston-Cambridge-Newton, MA-NH Metropolitan Statistical Area as well as the greater Boston-Worcester-Providence, MA-RI-NH-CT Combined Statistical Area.