14th Street is a county highway in Hudson County, New Jersey, designated County Route 670. It begins at an intersection with Manhattan Avenue in Union City, also known as the South Wing Viaduct, and proceeds east over the 14th Street Viaduct to terminate at Sinatra Drive on the banks of the Hudson River in Hoboken. It is located at the northern end of Hoboken's street grid, and one of the only east–west streets in the city that allows for two-way traffic. It is located two blocks south of Weehawken Cove.

Union City is a city in the northern part of Hudson County, in the U.S. state of New Jersey. As of the 2020 United States census, the city was the state's 18th-most-populous municipality, with a population of 68,589, an increase of 2,134 (+3.2%) from the 2010 census count of 66,455, which in turn had reflected a decline of 633 (−0.9%) from the 67,088 counted in the 2000 census. As of the 2010 Census, among cities with a population of more than 50,000, it was the most densely populated city in the United States, with a density of 54,138 per square mile of land. The Census Bureau's Population Estimates Program calculated that the city's population was 65,366 in 2022, ranking the city the 590th-most-populous in the country.