Bergen County is the most populous county of the state of New Jersey, United States. As of the 2010 United States Census, its population was 905,116, an increase of 20,998 (2.4%) from the 884,118 enumerated in the 2000 Census, retaining its position as the state's most populous county. The county is part of the New York City Metropolitan Area. Its county seat is Hackensack. The Bureau of Economic Analysis ranked the county as having the 20th-highest per capita income of all 3,113 counties in the United States (and the fourth highest in New Jersey) as of 2009. The county hosts a park system totaling nearly 9,000 acres (3,600 ha).