Jersey City is the second-most populous city in the U.S. state of New Jersey, after Newark. It is largest city and county seat of Hudson County As of the 2020 United States census, the city's population was 292,449, an increase of 44,852 (+18.1%) from the 2010 census count of 247,597, in turn an increase of 7,542 (+3.1%) from the 240,055 enumerated at the 2000 census. The Census Bureau's Population Estimates Program calculated that the city's population was 283,927 in 2021, ranking the city the 75th-most-populous in the country.Constituting part of the New York metropolitan area, Jersey City is bounded on the east by the Hudson River and Upper New York Bay and on the west by the Hackensack River and Newark Bay. A port of entry, with 30.7 miles (49.4 km) of waterfront and extensive rail infrastructure and connectivity, the city is an important transportation terminus and distribution and manufacturing center for the Port of New York and New Jersey. Jersey City shares significant mass transit connections with Manhattan. Redevelopment of the Jersey City waterfront has made the city one of the largest centers of banking and finance in the United States and has led to the district and city being nicknamed Wall Street West. By the early 2020s, the construction of residential high-rises made median rental rates the highest of any city in the United States.