Norfolk County, Massachusetts

Norfolk County, Massachusetts
Motto(s): 
Antiquity, Perseverance, History, Industry
Location within the U.S. state of Massachusetts
Coordinates: 42°11′57″N 71°09′16″W / 42.199158°N 71.154442°W / 42.199158; -71.154442
Country United States
State Massachusetts
Founded1793
Named afterNorfolk, England
SeatDedham
Largest cityQuincy
Area
 • Total
444 sq mi (1,150 km2)
 • Land396 sq mi (1,030 km2)
 • Water48 sq mi (120 km2)  11%
Population
 (2020)
 • Total
725,981
 • Estimate 
(2024)
740,754
 • Density1,830/sq mi (708/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts2nd, 4th, 7th, 8th
Websitenorfolkcounty.org

Norfolk County (/ˈnɔːrfək/ NOR-fək) is located in the U.S. state of Massachusetts. At the 2020 census, the population was around 725,981. Its county seat is Dedham. The county was named after the English county of the same name. 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.