ZIP code 03878: Somersworth, NH
03878 is a ZIP code in Somersworth, New Hampshire, mainly in Strafford County, part of the Boston-Cambridge-Newton, MA-NH metro area. About 12,205 people live here.
- Population
- 12,205
- Median household income
- $75,136
- Typical home value
- $444,400+2.8% in 12 months
- Median rent
- $1,479gross, per month
- Median age
- 38.5
- Homeowners
- 58%of occupied homes
Shaded: ZIP code 03878's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 03878 details
| City | Somersworth |
|---|---|
| State | New Hampshire |
| County | Strafford County |
| Metro area | Boston-Cambridge-Newton, MA-NH |
| Time zone | Eastern Time (UTC−5), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 9.8 sq mi, plus 0.2 sq mi of water |
| Population density | 1,243 people per sq mi |
| Bachelor's degree or higher | 31.3% of adults 25+ |
| Average commute | 25.8 minutes |
| Center coordinates | 43.25348, -70.88794 |
Median rent in 03878 by bedrooms
| Size | Median gross rent |
|---|---|
| Studio | $1,394/mo |
| 1 bedroom | $1,169/mo |
| 2 bedrooms | $1,642/mo |
| 3 bedrooms | $1,432/mo |
| 4 bedrooms | $1,833/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 03878
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 03869 | Rollinsford, NH | 3.2 mi | 2,456 |
| 03822 | Dover, NH | 3.9 mi | — |
| 03821 | Dover, NH | 3.9 mi | — |
| 03901 | Berwick, ME | 3.9 mi | 8,175 |
| 03820 | Dover, NH | 4.6 mi | 33,440 |
| 03839 | Rochester, NH | 5.0 mi | 4,279 |
| 03868 | Rochester, NH | 5.6 mi | 6,133 |
| 03866 | Rochester, NH | 5.6 mi | — |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 03878?
A typical home in ZIP code 03878 is worth about $444,400 (Zillow Home Value Index). The median household here earns $75,136 a year. See what buying here would cost per month, with New Hampshire average taxes and insurance filled in.
Monthly payment for a $444,400 homeWhat can a $75,136 income afford?Rental property numbers
About ZIP code 03878
What city is ZIP code 03878?
ZIP code 03878 is in Somersworth, NH, in Strafford County.
What county is ZIP code 03878 in?
03878 is mainly in Strafford County, New Hampshire.
What is the population of ZIP code 03878?
About 12,205 people live in ZIP code 03878, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 03878 in?
03878 is in Eastern Time (UTC−5). It observes daylight saving time.