Home > NH > Rockingham County > New Castle > Zip 03854

Zip Code 03854 — New Castle, NH

03854 is a ZIP Code associated with New Castle, NH, located within Rockingham. The postal region supports an estimated population of 827 residents across Data Pending housing units, with a population density of 394.9 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (43.065580, -70.720030)

Data MetricLocal Statistic
Postal / Zip Code03854
Primary CityNew Castle
State / ProvinceNH
CountyRockingham
Total Population827
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density394.9 people/sq mi
TimezoneAmerica/New_York

How 03854 Compares

MetricZIP 03854Rockingham CountyNH State Average
Population827319,0821,394,951
Median IncomeData PendingN/AN/A
Population Density394.9 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 03870Rye4.0 mi5,188N/A
Zip 03801Portsmouth4.3 mi23,484N/A
Zip 03871Rye Beach6.5 mi356N/A
Zip 03840Greenland6.7 mi4,106N/A
Zip 03862North Hampton8.2 mi4,610N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →