Hackensack is the most populous municipality and the county seat of Bergen County, in the U.S. state of New Jersey. The area was officially named New Barbadoes Township until 1921, but has informally been known as Hackensack since at least the 18th century. As of the 2020 United States census, the city's population was 46,030, its highest decennial count ever and an increase of 3,020 (+7.0%) from the 2010 census count of 43,010, which in turn reflected an increase of 333 (+0.8%) from the 42,677 counted in the 2000 census. An inner suburb of New York City, Hackensack is located approximately 12 miles (19 km) northwest of Midtown Manhattan and about 7 miles (11 km) from the George Washington Bridge. From a number of locations, including portions of Prospect Avenue, the New York City skyline can be seen. The Metropolitan Campus of Fairleigh Dickinson University straddles the Hackensack River in both Hackensack and Teaneck. Hackensack is also the home of the former New Jersey Naval Museum and the World War II submarine USS Ling. Astronaut Wally Schirra is perhaps Hackensack's most famous native son. The city has diverse neighborhoods and land uses located close to one another. Within its borders are the Hackensack University Medical Center, a residential high-rise district about a mile long (along Prospect Avenue between Beech Street and Passaic Street), suburban neighborhoods of single-family houses, stately older homes on acre-plus lots, older two-family neighborhoods, large garden apartment complexes, industrial areas, the Bergen County Jail, a tidal river, Hackensack River County Park, Borg's Woods Nature Preserve, various city parks, large office buildings, a major college campus, the Bergen County Court House, a vibrant small-city downtown district, and various small neighborhood business districts.