Union City is a city in Hudson County, New Jersey, United States. According to the 2010 United States Census the city had a total population of 66,455, reflecting a decline of 633 (−0.9%) from the 67,088 counted in the 2000 Census, which had in turn increased by 9,076 (+15.6%) from the 58,012 counted in the 1990 Census. As of the 2010 Census it was the most densely populated city in the United States,a[›] with a density of 51,810.1 per square mile.
Union City was incorporated as a city by an act of the New Jersey Legislature on June 1, 1925, with the merger of Union Hill and West Hoboken Township. The city’s name marks the combination of the two municipalities. Two major waves of immigration, first of German speakers and then of Spanish speakers, greatly influenced the development and character of Union City. Its two nicknames, “Embroidery Capital of the United States” and “Havana on the Hudson”, reflect important aspects of that history. Thousands make a pilgrimage to Union City each year to see the nation’s longest-running passion play and the annual Cuban Day Parade of New Jersey. The city is notable for being the location where Mallomars were first sold and the site of the first lunch wagon built by Jerry and Daniel O’Mahoney and John Hanf, which helped spark New Jersey’s golden age of diner manufacturing, and made the state the diner capital of the world.
According to the United States Census Bureau, the city had a total area of 1.283 square miles (3.322 km2), all of which is land. Part of the New York metropolitan area, it is one of the municipalities which comprise North Hudson, New Jersey. Located atop the ridge of the lower Hudson Palisades (just south of the highest point in the county), many of its streets offer glimpses and views of the surrounding municipalities, the New York City skyline, and the New Jersey Meadowlands.
The city is bisected by New Jersey Route 495, a vehicular cut built in conjunction with the Lincoln Tunnel. Soon after its construction, many street names were abandoned in favor of numbering in most of North Hudson starting at 2nd Street, just north of Paterson Plank Road, which runs through the city’s only major park and creates its border with Jersey City. 49th Street is the northern boundary with West New York. Apart from a small section between Bergen Turnpike and Weehawken Cemetery, Kennedy Boulevard, a major north-south thoroughfare, creates the western border with North Bergen. A former colonial road and previous border between the merged municipalities takes three names as it diagonally crosses the city’s urban grid: Hackensack Plank Road, 32nd Street, and Bergen Turnpike. Most of the city north of the street, formerly Union Hill, shares its eastern border along Park Avenue with Weehawken. The southern section of the city, formerly West Hoboken, is indeed west of Hoboken, which it overlooks and is connected by the road which creates their shared border, the Wing Viaduct. Unincorporated communities, localities and place names located partially or completely within the city include Union Hill and West Hoboken.