Great Island Realty

Town of New Castle NH

Newcastle NH Lighthouse

New Castle is a picturesque town nestled on an island off the coast of New Hampshire, the smallest town in the state and the only one entirely situated on an island. Known originally as the Great Island, it's easily accessible via NH-1B from Portsmouth and Rye, NH. The town offers panoramic views of the Piscataqua River, which leads to the Atlantic Ocean, and across the river, you can see Kittery, Maine.

Historical Landmarks & Attractions

This beautiful community is steeped in history and offers year round oceanside vistas. It's home to several historical landmarks and popular attractions, making it a must-visit destination for history buffs and nature lovers alike.

The iconic Portsmouth Harbor Lighthouse is a beacon of the town's rich maritime past. Nearby, you'll find Fort Constitution, a historic military installation that played a significant role in the region's defense. Fort Stark, another former military site, now serves as an intriguing window into the past.

The Wentworth-by-the-Sear Hotel & Spa is another notable landmark in New Castle. This magnificent hotel exudes grandeur and elegance, offering luxurious accommodations and breathtaking views of the ocean.

Community & Lifestyle

Whether you're looking for a quiet seaside retreat or a vibrant community to call home, New Castle has something to offer. So, why not consider this beautiful island town for your next visit or even as a place to settle down?

New Castle also presents a variety of real estate opportunities, from charming coastal homes to modern builds. Whether you're considering a permanent move or seeking a seasonal residence, you'll find a range of options to suit your preferences and lifestyle.


New Castle is served by three public schools: Maude H. Trefethen School (K-6), Rye Junior High School (7 & 8), and Portsmouth High School (9-12). With its safe environment and quality education, New Castle offers a serene and enriching setting.

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