Sussex County is the northernmost county in the State of New Jersey. Its county seat is Newton. It is part of the New York City Metropolitan Area. As of the 2017 Census estimate, the county’s population was 141,682, making it the 17th-most populous of the state’s 21 counties, a 5.1% decrease from the 149,265 enumerated in the 2010 United States Census, in turn an increase of 5,099 (3.5%) over the 144,166 persons enumerated in the 2000 Census. Based on 2010 Census data, Vernon Township was the county’s largest in both population and area, with a population of 23,943 and covering an area of 70.59 square miles (182.8 km2).[10]
In 2015, the county had a per capita personal income of $55,497, the ninth-highest in New Jersey and ranked 220th of 3,113 counties in the United States. As of 2010 The Bureau of Economic Analysis ranked the county as having the 131st-highest per capita income ($49,207) of the 3,113 counties in the United States (and the ninth-highest in the state).
The county was established in 1753 and named after historic County Sussex, England.
Source: Wikipedia
