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General Langdon Information Cavalier County where Langdon resides is 1,510.14 square miles. The resident population of this county is 4,831 and has a population rank of 2,858 out of all the places in the United States. Langdon has a total of 2,101 people and of those residents there are 981 males and 1,120 females.
Nashua, NH. Online Offers. Nashua is a city in Hillsborough County, New Hampshire, USA. As of the 2010 census, Nashua had a total population of 86,494, making it the second largest city in the state (and in the three northern New England states) after Manchester.