PlainZIP

Somersworth, NH · standard

ZIP Code 03878

Strafford County, New Hampshire - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

11,824
456/sq mi
$75,136
Median income
$317,900
Median home value
31.3%
Bachelor's or higher

The verdict

Somersworth pairs an above-median household income with above-median home values, in a low-density, mixed-tenure area.

Top 45%
household income, US ZIPs
Top 31%
home value, US ZIPs
456
people per sq mi
58%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 03878 against every reporting US ZIP.

ZIP code 03878 is a mid-sized community (a standard USPS delivery area) in Somersworth, Strafford County, New Hampshire, home to 11,824 residents across 25.9 square miles, a density of 456 people per square mile, in the New York time zone.

ZIP 03878 lands in the middle-income range, with a median household income of $75,136 (27% below the New Hampshire average), while per-capita income is $42,408. Poverty here runs at 11.2%, with unemployment measured at 2.8%. On housing, the median home value is $317,900 (21% below the state average) with median rent at $1,479 per month, and 58.0% of occupied units are owner-occupied.

A solid share of residents have a four-year degree: 31.3% of adults hold a bachelor's degree or higher, the median age is 38.5, and the average commute is 26 minutes. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 03878, plus 6 more within Strafford County, give a clearer read than the national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 03878

Top 5 sectors by establishment count in Somersworth, NH

Which industries have the most business establishments in ZIP 03878.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 03878, Somersworth, NH · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

11,824

Population

25.9

Area (sq mi)

456

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 03878?

38.5

Median Age

46.8%

Male

53.2%

Female

6.5%

Foreign-Born

White 84.2%
African American 2.2%
Asian 2.5%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 9.8%
Hispanic or Latino 5.9%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$75,136

Median Household Income

-27% vs state

$42,408

Per Capita Income

11.2%

Poverty Rate

2.8%

Unemployment Rate

25.8 min

Mean Commute Time

How ZIP 03878 ranks nationally

Somersworth, NH household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$75,136 Top 45% higher than 55% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 54.8%
Bachelor's Degree or Higher 31.3%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

5,690

Total Housing Units

5,245

Occupied Units

445

Vacant Units

2.32

Avg Household Size

Occupancy Type

Owner 58.0%
Renter 42.0%

$317,900

Median Home Value

-21% vs state

$1,479

Median Rent

1966

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+8.9%

YoY Change (2024)

304

HPI Index (2000 = 100)

+204%

Total Change Since 2000

Home values in ZIP 03878 have increased 8.9% over the past year (2024). Since 2000, this ZIP has seen +204% cumulative appreciation.

Year Annual Change HPI Index
2020 +7.5% 183
2021 +15.8% 212
2022 +17.5% 249
2023 +12.0% 279
2024 +8.9% 304

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 318 business establishments in ZIP 03878, employing approximately 5,139 people with a combined annual payroll of $241,871,000.

318

Businesses

5,139

Employees

$241.9M

Annual Payroll

15

Industry Sectors

Industry Establishments % of Total
Retail trade 76 23.9%
Health care and social assistance 36 11.3%
Other services (except public administration) 34 10.7%
Manufacturing 30 9.4%
Accommodation and food services 29 9.1%
Professional, scientific, and technical services 26 8.2%
Construction 23 7.2%
Administrative and support and waste management and remediation services 16 5.0%
Real estate and rental and leasing 12 3.8%
Transportation and warehousing 7 2.2%
Wholesale trade 6 1.9%
Finance and insurance 6 1.9%
Educational services 6 1.9%
Arts, entertainment, and recreation 6 1.9%
Information 4 1.3%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 03878 vs 03820 →

ZIP 03878 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 03878 ranks #4 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 03878 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 03878 ranks #null of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
03820 Dover, NH 30,039 4.4 mi
03869 Rollinsford, NH 2,469 3.1 mi
03901 Berwick, ME 7,246 3.9 mi
03839 Rochester, NH 3,735 5.0 mi
03868 Rochester, NH 5,323 5.5 mi
03823 Madbury, NH 1,719 6.2 mi
03908 South Berwick, ME 7,233 7.0 mi
03867 Rochester, NH 20,758 6.2 mi
03824 Durham, NH 14,638 9.5 mi
03906 North Berwick, ME 4,647 8.4 mi

More ZIP Codes in Strafford County

03820 standard
Dover, NH
Pop: 30,039
03867 standard
Rochester, NH
Pop: 20,758
03824 standard
Durham, NH
Pop: 14,638
03825 standard
Barrington, NH
Pop: 8,512
03835 standard
Farmington, NH
Pop: 6,786
03868 standard
Rochester, NH
Pop: 5,323

Related Areas

Strafford County Somersworth, NH New Hampshire

Frequently Asked Questions

What county is ZIP code 03878 in? ▼
ZIP code 03878 (Somersworth) is located in Strafford County, New Hampshire. Strafford County contains multiple ZIP codes, see the full list at /counties/strafford-nh.
What is the population of ZIP code 03878? ▼
ZIP code 03878 in Somersworth, NH has a population of 11,824 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 03878? ▼
The median household income in ZIP 03878 is $75,136, which is 2% below the national average of $76,288.
What is the average home value in ZIP 03878? ▼
The median home value in ZIP 03878 is $317,900, which is 14% above the national average of $278,155.
What is the demographic makeup of ZIP 03878? ▼
The largest racial group in ZIP 03878 is White at 84.2%. Hispanic or Latino residents make up 5.9% of the population.
How many businesses are in ZIP code 03878? ▼
ZIP code 03878 has 318 business establishments employing approximately 5,139 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 03878? ▼
The top industries by establishment count in ZIP 03878 are: Retail trade (76), Health care and social assistance (36), Other services (except public administration) (34). There are 15 industry sectors represented in total.
How have home values changed in ZIP code 03878? ▼
According to the FHFA House Price Index, home values in ZIP 03878 increased by 8.9% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 204%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 03878? ▼
In ZIP code 03878, 54.8% of residents aged 25+ have a high school diploma or higher, and 31.3% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 03878? ▼
The mean commute time for workers in ZIP code 03878 is 25.8 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 03878? ▼
In ZIP code 03878, approximately 58.0% of occupied housing units are owner-occupied and 42.0% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 03878? ▼
The poverty rate in ZIP code 03878 is 11.2% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.