New Castle, NH ZIP Codes, Coordinates & Counties
New Castle, New Hampshire has 1 ZIP code in Rockingham county. The approximate center of New Castle is 43.066, -70.72. New Castle has about 4,274 known street addresses.
ZIP codes in New Castle, NH
| ZIP Code | County | Latitude | Longitude |
|---|---|---|---|
| 03854 | Rockingham | 43.066 | -70.72 |
Counties New Castle spans
Rockingham
Most common streets in New Castle
Wentworth, Morgans, Campbells, Main, Walton, Davidson, Colonial, Shore, Laurel, Elm
Frequently asked questions
What ZIP codes are in New Castle, NH?
New Castle, New Hampshire has 1 ZIP code, ranging from 03854 to 03854. The full list, with each ZIP's county and coordinates, is in the table on this page.
What county is New Castle, NH in?
New Castle is in Rockingham county.
What are the latitude and longitude of New Castle, NH?
The approximate center of New Castle, New Hampshire is latitude 43.066, longitude -70.72. Coordinates for each ZIP code are listed in the table above.
How many ZIP codes does New Castle, NH have?
New Castle has 1 ZIP code.
How many addresses are in New Castle, NH?
New Castle, New Hampshire has about 4,274 known street addresses in the sthan.io US address database.
What are the most common streets in New Castle, NH?
Some of the most common street names in New Castle are Wentworth, Morgans, Campbells, Main, Walton, Davidson.
What cities are near New Castle, NH?
Cities near New Castle include Kittery Point (2 mi), Kittery (3 mi), Portsmouth (4 mi), Rye (4 mi), Rye Beach (6 mi).
Cities near New Castle
Kittery Point, ME (2 mi) Kittery, ME (3 mi) Portsmouth, NH (4 mi) Rye, NH (4 mi) Rye Beach, NH (6 mi) York Harbor, ME (6 mi) Eliot, ME (7 mi) York, ME (7 mi)
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View the API →Last updated: June 2026 · Data: sthan.io US address database