Nashua is a city in southern New Hampshire, United States. As of the 2010 census, Nashua had a population of 86,494, making it the second-largest city in the state and in northern New England after nearby Manchester.
As of 2018 the population had risen to an estimated 89,246. Nashua is, along with Manchester, one of two seats of New Hampshire's most populous county, Hillsborough County. Built around the now-departed textile industry, in recent decades it has been swept up in southern New Hampshire's economic expansion as part of the Boston region. Nashua was twice named "Best Place to Live in America" in annual surveys by Money magazine. It is the only city to get the No. 1 ranking on two occasions—in 1987 and 1998. The area was part of a 200-square-mile (520 km2) tract of land in Massachusetts called "Dunstable", which had been awarded to Edward Tyng of Dunstable, England. Nashua lies approximately in the center of the original 1673 grant. In 1732, Dunstable was split along the Merrimack River, with the town of Nottingham (now the town of Hudson, New Hampshire) created out of the eastern portion.