Incorporated: 1693
Population: 1,020
County Name: Rockingham
(county map)
Town Contact:
Town of New Castle
PO Box 367
New Castle, NH 03854

Phone: 603-431-6710
Fax: 603-433-6198
Website: Town of New Castle

Origin:
The largest of several islands at the mouth of the Piscataqua River, this town was originally known as Great Island. Chartered in 1679 as a parish of Portsmouth, it was incorporated in 1693. New Castle is unique in the state, being the only town made up entirely of islands, connected to the mainland by bridges. New Castle is home to the Wentworth by the Sea Hotel, site of the Russo-Japanese Peace Treaty of 1905, mediated by Theodore Roosevelt.

More about New Castle:
New Castle is home to Fort Constitution and Fort Stark, two of seven forts built to protect the Portsmouth Harbor. Fort Constitution has a commonly photographed lighthouse onsite.

The historic Wentworth By the Sea sits on top of a bluff overlooking the ocean and Piscataquog River. Known as the "Jewel" of the New Hampshire Seacoast, this grand hotel and spa was originally opened in 1874.