Essex County, Massachusetts | ||
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![]() Superior Courthouse in Salem
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![]() Location in the U.S. state of Massachusetts |
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![]() Massachusetts's location in the U.S. |
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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
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 Boston–Cambridge–Newton, 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.