Essex County | |
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![]() Newark Penn Station in Newark at dusk in June 2015 | |
![]() Location within the U.S. state of New Jersey | |
![]() New Jersey's location within the U.S. | |
Coordinates: 40°47′N 74°15′W / 40.79°N 74.25°W | |
Country | ![]() |
State | ![]() |
Founded | March 7, 1683[1] |
Named for | Essex, England |
Seat | Newark[1] |
Largest city | Newark (population and area) |
Area | |
• Total | 129.42 sq mi (335.2 km2) |
• Land | 126.09 sq mi (326.6 km2) |
• Water | 3.34 sq mi (8.7 km2) 2.6% |
Population | |
• Total | 863,728 |
• Density | 6,843.5/sq mi (2,642.3/km2) |
Congressional districts | 8th, 10th, 11th |
Website | www |
Essex County is a county in the northeastern part of the U.S. state of New Jersey. As of 2020, 863,728 people lived there,[3] making it the third most populous county in the state, behind Bergen County and Middlesex County, and the second most densely population county in the state after Hudson County. The seat of the county is Newark, the largest city in the state.