ZIP Code 03878
standardSource:
Somersworth · Strafford County · New Hampshire
- Population
- 11,824
- Median income
- $75,136
- Median home value
- $317,900
- Bachelor's or higher
- 31.3%
- Land area
- 25.9 sq mi
456/sq mi
▼ 2% vs US
higher than 55% of US ZIPs
▲ 14% vs US
higher than 69% of US ZIPs
Median age 38.5
New York
ZIP code 03878 in Somersworth, New Hampshire has a population of 11,824. The median household income is $75,136, which is 2% below the national average. Median home value is $317,900, 14% above the US average. 31.3% of residents hold a bachelor's degree or higher.
ZIP code 03878 is classified by USPS as a standard delivery area and covers roughly 25.9 square miles in Somersworth, Strafford County, New Hampshire. The area is home to 11,824 residents, producing a population density of 456 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 03878 against New Hampshire and the nation.
On the economic side, the median household income for ZIP 03878 sits at $75,136 (27% below the New Hampshire average), while per-capita income is $42,408. The poverty rate stands at 11.2% and the unemployment rate 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 direct signal of whether 03878 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 31.3% of adults hold a bachelor's degree or higher, the median age is 38.5, and the average commute is 26 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Strafford County, so you can benchmark 03878 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 03878
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 03878.
- Retail trade
Retail trade
76 establishments
- Health care and social assistance
Health care and social assistance
36 establishments
- Other services (except public administration)
Other services (except public administration)
34 establishments
- Manufacturing 30
Manufacturing
30 establishments
- Accommodation and food services 29
Accommodation and food services
29 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, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, 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; HUD FMR + 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
Who lives in ZIP 03878?
38.5
Median Age
46.8%
Male
53.2%
Female
6.5%
Foreign-Born
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
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
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
$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 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
Related Areas
Frequently Asked Questions
What county is ZIP code 03878 in? ▼
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What is the demographic makeup of ZIP 03878? ▼
How many businesses are in ZIP code 03878? ▼
What are the main industries in ZIP code 03878? ▼
How have home values changed in ZIP code 03878? ▼
What is the education level in ZIP code 03878? ▼
What is the average commute time in ZIP 03878? ▼
What percentage of residents own vs. rent in ZIP 03878? ▼
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ZIP Code Research Guides
Official Data Resources for Somersworth, NH
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.