Hudson is a town in Middlesex County, Massachusetts, United States, with a total population of 19,063 as of the 2010 census. Before its incorporation as a town in 1866, Hudson was a neighborhood and unincorporated village of Marlborough, Massachusetts, and was known as Feltonville. From around 1850 until the last shoe factory burned down in 1968, Hudson was known as a "shoe town." At one point, the town had 17 shoe factories, many of them powered by the Assabet River, which runs through town. Because of the many factories in Hudson, immigrants were attracted to the town. Today most people are of either Portuguese or Irish descent, with a smaller percentage of people being of French, Italian, English, or Scots-Irish descent. While some manufacturing remains in Hudson, the town is now primarily residential. Hudson is served by the Hudson Public Schools district.