03855 ZIP Code, New Durham, NH
03855 is a ZIP code in New Durham, New Hampshire in Strafford County. It covers 41 square miles of land. The closest ZIP codes are 03809, 03887 and 03851. 2,748 people live here in 1,091 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (94%). Median household income is $100,194, close to the New Hampshire median of $99,031; the median age is 46.5, older than most ZIP codes.
Quick facts
- Mailing city: New Durham, NH
- County: Strafford County
- Land area: 41 sq mi
- Population: 2,748
- Median household income: $100,194
- Carrier routes: 2 (1,257 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 2,748 |
| Households | 1,091 |
| Median household income | $100,194 |
| Income per person | $47,053 |
| Median age | 46.5 |
| Homeowners | 94.0% |
| Median home value | $339,400 |
| Median rent | $1,417 |
| Bachelor's degree or higher | 34.7% |
| Average commute (minutes) | 34.7 |
| Households with kids under 18 | 23.4% |
| Moved in the past year | 8.6% |
| Below the poverty line | 5.8% |
| Broadband internet | 92.3% |
| Speak a non-English language at home | 0.9% |
Household income
| % of households | Value |
|---|---|
| <$10K | 4.9% |
| $10–15K | 1.3% |
| $15–25K | 1.9% |
| $25–35K | 2.7% |
| $35–50K | 12.1% |
| $50–75K | 12.4% |
| $75–100K | 14.5% |
| $100–150K | 22.6% |
| $150–200K | 12.4% |
| $200K+ | 15.3% |
Age
| % of all residents | Value |
|---|---|
| <10 | 9.8% |
| 10–19 | 5.0% |
| 20–24 | 5.2% |
| 25–34 | 14.3% |
| 35–44 | 13.5% |
| 45–54 | 10.3% |
| 55–64 | 18.1% |
| 65–74 | 18.3% |
| 75+ | 5.5% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 38.2% |
| Owned outright | 24.8% |
| Rented | 3.9% |
| Vacant | 33.1% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 91.3% |
| Townhome | 1.2% |
| 2–4 units | 2.1% |
| 5–19 units | 0.0% |
| 20+ units | 0.0% |
| Mobile / other | 5.4% |
Businesses in 03855
28 business establishments with 146 employees (ZIP Codes Business Patterns 2023).
- Construction: 11
- Retail Trade: 4
- Accommodation and Food Services: 4
EDDM carrier routes
03855 has 2 USPS carrier routes with 1,257 residential and 6 business mailboxes. Open the EDDM route map.
Carrier routes in 03855
03855 has 2 USPS carrier routes (2 rural (R)) with 1,257 residential and 6 business mailboxes. Routes range from 608 homes (R032) to 649 homes (R031); the median route has 629 homes. The Census counted 1,091 households in 03855 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 0 |
| 500–749 | 2 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 03855 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R032 — USPS business mailboxes 5, 608 homes
- Route R031 — USPS business mailboxes 1, 649 homes
Select these 2 routes on the route map
Every carrier route in 03855
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R031 | Rural | 649 | 1 | $98,487 | — | — | — |
| R032 | Rural | 608 | 5 | $98,487 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 03855 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 03809 — Alton CDP, NH (2.4 mi)
- 03887 — Union CDP, NH (4.3 mi)
- 03851 — Milton CDP, NH (6.6 mi)
- 03810 — Alton CDP, NH (7.9 mi)
- 03835 — Farmington CDP, NH (8.1 mi)
- 03225 (8.2 mi)
- 03852 — Milton Mills CDP, NH (8.6 mi)
- 03872 — Sanbornville CDP, NH (9.2 mi)
Areas that include 03855
- New Durham, NH ZIP codes — 1 ZIP code
- Strafford County ZIP codes — 16 ZIP codes
- New Hampshire ZIP code data
Where it ranks
- No. 3 of 15: highest share of owner-occupied homes in Strafford County
- No. 2 of 15: highest median age in Strafford County
Mail every home in 03855
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 03855, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 03855 in?
- 03855 is a New Durham, NH mailing address. None of its land lies inside a Census-defined city or community.
- What county is 03855 in?
- 03855 is in Strafford County.
- What is the population of 03855?
- About 2,748 people (±37), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 2,693.
- What is the median household income in 03855?
- $100,194 (±$12,931), compared with $99,031 for New Hampshire as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 03855?
- 2 USPS carrier routes with 1,257 residential and 6 business mailboxes (1,264 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 03855?
- The closest, measured center to center: 03809 (2.4 mi, Alton), 03887 (4.3 mi, Union), 03851 (6.6 mi, Milton), 03810 (7.9 mi, Alton), 03835 (8.1 mi, Farmington) and 03225 (8.2 mi).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.