Hudson County, New Jersey Hudson County, New Jersey Hudson County, a county in the U.S. state of New Jersey, lies west of the lower Hudson River, which was named for Henry Hudson, the sea captain who explored the area in 1609. Part of New Jersey's Gateway Region in the New York metropolitan area, Jersey City is its largest city and county seat. As of the 2017 Census estimate, Hudson County was the fastest-growing county in New Jersey compared to 2010; the county's population was 691,643, making it the state's 4th-most populous county, an increase of 9.0% from the 2010 United States Census, when its
New Jersey v. New York New Jersey v. New York New Jersey v. New York, 523 U.S. 767 (1998), was a United States Supreme Court case in which it was determined that roughly 90% of Ellis Island was part of New Jersey rather than New York. An interstate compact had been signed between New York and New Jersey in 1834, prior to Ellis Island becoming a major immigration center. This compact granted New York the rights to all islands in the water channel separating the two states including both Ellis Island and Liberty Island, but granting New Jersey the rights to half of the water