![]() | Parts of this article (those related to population figure) need to be updated. The reason given is: 2020 census.(March 2023) |
Norfolk County | |
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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 | |
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 | |
Country | ![]() |
State | ![]() |
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 |
• Estimate (2023) | 727,473 ![]() |
• Density | 1,600/sq mi (630/km2) |
Time zone | UTC−5 (Eastern) |
• Summer (DST) | UTC−4 (EDT) |
Congressional districts | 2nd, 4th, 7th, 8th |
Website | norfolkcounty |
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.