Essex County, Massachusetts
Essex County is a county in the northeastern part of the state of Massachusetts. As of the 2010 census, the total population was 743,159. It is the third-most populous county in the state. It is part of the Greater Boston area (the Boston–Cambridge–Newton, MA–NH Metropolitan Statistical Area).
Former Essex County Courthouse in Salem
Location within the U.S. state of Massachusetts
Massachusetts's location within the U.S.
|Seat||Salem and Lawrence|
|• Total||828 sq mi (2,140 km2)|
|• Land||493 sq mi (1,280 km2)|
|• Water||336 sq mi (870 km2) 41%%|
| • Estimate |
|• Density||1,509/sq mi (583/km2)|
|Time zone||UTC−5 (Eastern)|
|• Summer (DST)||UTC−4 (EDT)|
|Congressional districts||3rd, 6th|