Hackensack is a city in Bergen County in New Jersey, United States, and serves as its county seat. The area was officially named New Barbadoes Township until 1921, but it was informally known as Hackensack since at least the 18th century. As of the 2010 United States Census, the city's population was 43,010, reflecting an increase of 333 from the 42,677 counted in the 2000 Census, which had, in turn, increased by 5,628 from the 37,049 counted in the 1990 Census.
An inner suburb of New York City, Hackensack is located approximately 12 miles northwest of Midtown Manhattan and about 7 miles from the George Washington Bridge. From a number of locations, 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.