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New Castle, the only town in NH composed entirely of islands, covers approximately 500 acres (.8 square miles) and serves as a scenic residential and recreational community.  New Castle was founded in 1623, chartered in 1679, and incorporated in 1693 during the reign of William and Mary.  Today, in addition to a residential population of slightly more than 1,000, it is home to the Great Island Common recreational park, Wentworth-by-the-Sea Hotel and Spa, a UNH marine research laboratory, a Coast Guard station, and Fort Constitution and Fort Stark state parks.

Photos courtesy of Jim Cerny.

        NOTICES: :

  • Click here for the most recent Water Study Report (March 01, 2018) and read about "Steps We Are Taking".
  • Maude H. Trefethen Elementary School update by David W. Latchaw, Principal
  • March 1, 2018 - Conservation Tree & Shrub Cutting Guidelines.
  • April 14, 2018 (Saturday) Road Race on 1B starting at 9am
  • April 15, 2018 (Sunday) Road March on 1B between the hours of 9:30am - 2:00 bring a photo ID and proof of street address (not PO Box) such as found on a lease, bill or car registration. Changes of party affiliation, address or name can be made to the Checklist of registered voters at this time as well.
  • May 1, 2018 - Non-resident passes go on sale at 8am at the Town Hall
  • May 1, 2018 - first day to accept Pavilion reservations for the Great Island Common

Need to contact the town office?
  • Phone 603-431-6710
  • Fax 603-433-6198
  • Great Island Common 603-436-1992 (Seasonal)
  • Email Us

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