Sussex County is the northernmost county in the U.S. state of New Jersey. Its county seat is Newton. It is part of the New York metropolitan area and is part of New Jersey's Skylands Region. As of the 2020 census, the county was the state's 17th-most-populous county, with a population of 144,221, a decrease of 5,044 from the 2010 census count of 149,265…
Sussex County is the northernmost county in the U.S. state of New Jersey. Its county seat is Newton. It is part of the New York metropolitan area and is part of New Jersey's Skylands Region. As of the 2020 census, the county was the state's 17th-most-populous county, with a population of 144,221, a decrease of 5,044 from the 2010 census count of 149,265, which in turn reflected an increase of 5,099 over the 144,166 persons at the 2000 census. Based on 2020 census data, Vernon Township was the county's largest in both population and area, with a population of 22,358 and covering an area of 70.59 square miles. The county is part of the North Jersey region of the state.
Country: United States
State: New Jersey
Founded: June 8, 1753
Named for: Sussex, England
Seat: Newton
Largest municipality: Vernon Township (population and area)
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