Norfolk County, Massachusetts

Parts of this article (those related to population figure) need to be updated. The reason given is: 2020 census. Please help update this article to reflect recent events or newly available information. (March 2023)

Norfolk County
County
Images, from top down, left to right: Former residence of John Adams in Quincy; Trail in the Blue Hills Reservation; MBTA station in Brookline; Green Hall at Wellesley College
Flag Seal
Motto(s):  Antiquity, Perseverance, History, Industry
Location within the U.S. state of Massachusetts
Massachusetts's location within the U.S.
Coordinates: 42°11′57″N 71°09′16″W / 42.199158°N 71.154442°W / 42.199158; -71.154442
Country	United States
State	Massachusetts
Founded	1793
Named for	Norfolk
Seat	Dedham
Largest city	Quincy
Area
• Total	444 sq mi (1,150 km2)
• Land	396 sq mi (1,030 km2)
• Water	48 sq mi (120 km2)  11%
Population  (2020)
• Total	725,981
• Density	1,833/sq mi (708/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional districts	2nd, 4th, 7th, 8th
Website	norfolkcounty.org

Norfolk County (/ˈnɔːrfək/, NOR-fək) is located in the U.S. state of Massachusetts. At the 2020 census, the population was 725,981.^[1] Its county seat is Dedham.^[2] It is the fourth most populous county in the United States whose county seat is neither a city nor a borough, and it is the second most populous county that has a county seat at a town. The county was named after the English county of the same name.^[3] Two towns, Cohasset and Brookline, are exclaves.

Norfolk County is included in the Boston-Cambridge-Newton, MA-NH Metropolitan Statistical Area.

Norfolk County is the 24th highest-income county in the United States with a median household income of $107,361. It is the wealthiest county in Massachusetts.