🇺🇸 United States ZIP Code

STANDARD

03878

Somersworth

ZIP Code 03878 is a standard zip code serving Somersworth, Somersworth, New Hampshire (NH), in Strafford County, United States. It has an estimated population of 11,824 with a median household income of $53,241. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: New Hampshire (NH)
County: Strafford
City: Somersworth
Timezone: America/New_York

Coordinates

Latitude: 43.252500
Longitude: -70.875600

Geographic Details

Land Area: 9.99 mi²
Water Area: 0.20 mi²
Population Density: 1183.0 people per mi² (80th percentile)
Bounding Box: 43.287392°N, 43.223431°S, -70.838136°E, -70.927105°W

With 11,824 residents spread across 9.99 square miles, this area has a population density of 1183.0 people per square mile.

Demographics

11,824

Population

70th percentile

$53,241

Median Income

60th percentile

$212,000

Median Home Value

75th percentile

9.99 mi²

Land Area

The median household income in 03878 is $53,241, and the median home value is $212,000.

Housing

5,226

Total Units

4,888

Occupied Units

93.5%

Occupancy Rate

Similar ZIP Codes in New Hampshire

ZIP codes with similar median household income in New Hampshire.

03774

North Haverhill

$49,335

03608

Walpole

$52,976

03585

Lisbon

$48,162

03838

Glen

$54,926

03784

West Lebanon

$50,643

03301

Concord

$51,848

03574

Bethlehem

$49,455

03243

Hill

$56,667

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.