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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.


  • Property Inventories were mailed out on March 11 and due back on April 15th.
  • We will be starting May 1st to take any reservations for the Common (gazebo or tent rental) Non-resident stickers will be available for sale on May 1st. ($80) Only 75 available.
  • Resident stickers will be available starting on March 1st.  Please bring in your vehicle registration. Limited to three stickers per property.
  • First Green Waste Date - May 9 from 8 to 11am.  
  • Please go to the Town Clerk portion of the town website for a complete list of candidates up for election at the May 12th Town Meeting.

  • RYE Recreation Spring and Summer Programs are available at the Town Hall

Need to contact the town office?
  • Phone 603-431-6710
  • Fax 603-433-6198
  • Email Us

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