New Castle is a town in Rockingham County, New Hampshire, United States. The population was 1,000 at the 2020 census. It is the smallest and easternmost town in New Hampshire, and the only one located entirely on islands. It is home to Fort Constitution Historic Site, Fort Stark Historic Site, and the New Castle Common, a 31-acre recreation area on the Atlantic Ocean. New Castle is also home to a United States Coast Guard station, as well as the historic Wentworth by the Sea hotel.
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Wikipedia https://en.wikipedia.org/wiki/New_Castle,_New_Hampshire
Official Website https://www.newcastlenh.org/
Coordinates 43°3'59.102" N -70°43'11.475" E
