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
West Hudson, New Jersey West Hudson, New Jersey West Hudson is the collective name of the municipalities of Kearny, Harrison and East Newark located west of the Hackensack River and east of the Passaic River in Hudson County in northeastern New Jersey. The Passaic River separates it from Newark and Belleville, and the Hackensack River separates it from Jersey City, the county seat. Residential districts are concentrated along the banks of the Passaic, while along the Hackensack there is more industry, brownfields, or protected areas of the New Jersey Meadowlands known as the Kearny Meadows or the Kearny Marsh The area was known as