Jersey City is the seat of Hudson County, New Jersey, United States. As of the United States 2000 Census, the population of Jersey City was 240,055, making it New Jersey's second-largest city after Newark. As of the Census Bureau's 2007 estimate, the population had grown to 242,389. Part of the New York metropolitan area, Jersey City lies between of the Hudson River and Upper New York Bay across from Lower Manhattan and the Hackensack River and Newark Bay. A commercial and industrial center, it is a port of entry and a manufacturing center. With 11 miles (17.7 km) of waterfront and significant rail connections, Jersey City is an important transportation terminus and distribution center. Service industries have play a prominent role in the redevelopment of its waterfront and the creation of one of the nation's largest office-space real estate markets.