ZIP Code 03854
About New Castle
New Castle is a town in Rockingham County, New Hampshire, United States. The population was 1,000 at the 2020 census. It is the easternmost town in New Hampshire and the smallest by area, and it is the only town in the state located entirely on islands. It is home to Fort Constitution Historic Site, Fort Stark Historic Site, and the New Castle Common, a 31-acre (13 ha) 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.
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Area Profile
US Census (ACS 5-year · Gazetteer)
948
population
$193,558
median household income
1,172
people / sq mi
$1,612,700
median home value
$3,453
median gross rent
56.8
median age
517
housing units
439
households
0.8
land area (sq mi)
Key places in 03854
- Fort Constitution Historic Site attraction
- Fort Stark State Historic Site park
- Portsmouth Harbor Light historic
Nearby notable places
- Whaleback Lighthouse historic
Points of interest
- coffee