Guttenberg is a town in Hudson County, New Jersey, United States. As of the 2010 United States Census, the town's population was 11,176. Only four blocks wide, Guttenberg is the ninth-smallest municipality in the state and the most densely populated incorporated municipality in the United States, as well as one of the most densely populated municipalities worldwide, with 57,116 people per square mile of land area.The population increased by 369 (+3.4%) from the 10,807 counted in the 2000 Census, which had in turn increased by 2,539 (+30.7%) from the 8,268 counted in the 1990 Census. As of the 2010 Census, about one-fifth of the town's population resides in the Galaxy Towers, a trio of residential skyscrapers overlooking the Hudson River,.It has been described by The New York Times as "an old community of two-story row houses, small stores and light industry."HistoryGuttenberg was formerly a farm owned by William Cooper, sold in 1853 to a group of New Yorkers, who had formed the Weehawken Land and Ferry Association. Like nearby Union Hill, it was subdivided and lots were sold mostly to Germans. The company ran two ferries, the Hultz and the Flora, which crossed the Hudson from the landings at the foot of Bulls Ferry Road, Pleasant Valley, Fort Lee, and Spring Street in Manhattan.