at , New Castle, 03854 United States
New Castle is a town in Rockingham County, New Hampshire, United States. The population was 968 at the 2010 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 31acre 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.HistoryThe main island on which the town sits is the largest of several at the mouth of the Piscataqua River and was originally called Great Island. Settled in 1623, an earthwork defense was built on Fort Point which would evolve into Fort William and Mary (rebuilt in 1808 as Fort Constitution). Chartered in 1679 as a parish of Portsmouth, it was incorporated in 1693 and named New Castle after the fort. Until 1719 it included Rye, then called Sandy Beach. The principal industries were trade, tavern-keeping and fishing. There was also agriculture, using the abundant seaweed as fertilizer.
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