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Essex County, Massachusetts

Essex County, Massachusetts
Essex County Superior Courthouse, Salem MA.jpg
Superior Courthouse in Salem
Seal of Essex County, Massachusetts
Seal
Map of Massachusetts highlighting Essex County
Location in the U.S. state of Massachusetts
Map of the United States highlighting Massachusetts
Massachusetts's location in the U.S.
Founded 1643
Named for Essex
Seat Salem and Lawrence
Largest city Lynn
Area
 • Total 828 sq mi (2,145 km2)
 • Land 493 sq mi (1,277 km2)
 • Water 336 sq mi (870 km2), 41%
Population
 • (2010) 743,159
 • Density 1,509/sq mi (583/km²)
Congressional districts 3rd, 6th
Time zone EDT

Coordinates: 42°38′N 70°52′W / 42.64°N 70.87°W / 42.64; -70.87

Essex County is a county in the northeastern part of the U.S. state of Massachusetts. As of the 2010 census, the total population was 743,159, making it the third-most populous county in Massachusetts. It is part of the Greater Boston area (the BostonCambridgeNewton, MA–NH Metropolitan Statistical Area). The largest city in Essex County is Lynn.

It has two county seats: Salem and Lawrence. Prior to the dissolution of the county government in 1999, Salem had jurisdiction over the Southern Essex District, and Lawrence had jurisdiction over the Northern Essex District, but currently these cities do not function as seats of government. However, the county and the districts remain as administrative regions recognized by various governmental agencies, which gathered vital statistics or disposed of judicial case loads under these geographic subdivisions, and are required to keep the records based on them. The county has been designated the Essex National Heritage Area by the National Park Service.


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