Residential delivery area · New Hampshire
ZIP Code 03854: New Castle, NH
ZIP code 03854 uses the postal name New Castle, New Hampshire and lies entirely in Rockingham County (Census 2020 ZIP-county file). About 830 people live there (Census Bureau, ACS 2020-2024). Median household income is $176,953 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2021
- ZBP2023
- Town
- New Castle · its only residential ZIP
- County
- Rockingham County
- Metro area
- Boston-Cambridge-Newton, MA-NH
- House district
- NH-1 119th Congress
- State
- New Hampshire
- Time zone
- Eastern
- Land area
- 0.8 sq mi · 1,022 people per sq mi
Where is ZIP code 03854?
03854 centers on 43.062°, -70.717° and covers 0.8 square miles of land plus 1.5 of water. It borders 4 ZIP codes: 03904, 03870, 03801, 03905.
The map draws ZIP code areas only. For the streets inside 03854, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 03854 compare with the rest of Rockingham County?
| Measure | 03854 | In Rockingham County | In NH |
|---|---|---|---|
| People (ACS 2020-2024) | 827 | 35th of 37 | 211th of 247 |
| Median household income | $177k | not ranked | not ranked |
| Median home value | $1.7M | not ranked | not ranked |
03854's income and home value are not ranked: it has fewer than 1,000 residents (827). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 78% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 03854?
The 2020 Census counted 1,000 people in 03854; the ACS, which samples households over 2020-2024, estimates 827. Between the 2010 and 2020 censuses its population grew 3.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 827±216 (90% margin)
- 2020 Census count
- 1,000+3.3% since 2010 (968)
- Households
- 401
- Median age
- 62.8
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 03854?
Of the 827 people the ACS estimates in 03854, 12.9% are under 18 and 44.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (96.1%).
- Under 1812.9%
- 18 to 6442.8%
- 65 and older44.3%
- White, not Hispanic96.1%
- Other or two or more3.1%
- Asian, not Hispanic0.7%
- Hispanic or Latino0.0%
- Black, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 03854 earn?
Median household income is $176,953 (ACS 2020-2024). It is not measurably different from 2015-2019 ($166,871 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $176,953±$28,974
- Income per person
- $125,291
- Below the poverty line
- 4.6%
- Unemployed (of the labor force)
- 0.0%
- Adults 25+ with a bachelor's degree
- 68.8%
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 03854?
- Median home value (owners' estimate)
- $1,701,300
- Median gross rent
- $3,500 or more
- Homes owned by their occupants
- 93.0%
- Housing units
- 466
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 03854?
19 business establishments had a location in this ZIP code in 2023, 6 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services6
- Arts, entertainment, and recreation3
- Accommodation and food services3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 03854?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 03904 | Kittery, ME | 8,389 | $85k | 3.4 mi |
| 03870 | Rye | 5,188 | $141k | 3.7 mi |
| 03801 | Portsmouth | 23,484 | $107k | 4.5 mi |
| 03905 | Kittery Point, ME | 2,084 | $141k | 6.9 mi |
| 03871 | Rye Beach | 356 | $142k | 6.4 mi (near) |
| 03911 | York Harbor, ME | 363 | $156k | 6.5 mi (near) |
| 03903 | Eliot, ME | 7,146 | $102k | 6.5 mi (near) |
| 03840 | Greenland | 4,106 | $163k | 6.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.