Zip Code 03801
Portsmouth, New Hampshire — Rockingham County
📍 ZIP code 03801 is in Portsmouth, Rockingham County, New Hampshire.
ZIP code 03801 is located in Portsmouth, Rockingham County, New Hampshire. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 23,231. The area code for ZIP code 03801 is 603.
Quick Answer
Zip code 03801 is in Portsmouth, New Hampshire (Rockingham County). It has a population of 23,231, median household income of $106,520, and median home value of $647,500.
Population
23,231
Income
$106,520
Home Value
$647,500
Climate
81°F / 16°F
About Zip Code 03801
Zip code 03801 is located in Portsmouth, New Hampshire, within Rockingham County. Home to approximately 23,231 residents, this area sits at an elevation of 60 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 603.
The median household income is $106,520 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $647,500, and the cost of living index is 183 (83% above the national average of 100).
Summers average a high of 81°F while winters drop to 16°F. The area receives about 51 in of rain and 65 in of snow annually. The zip code covers 23.8 square miles of land area and 5.4 square miles of water.
Key Statistics
23,231
$106,520
$647,500
Eastern (EST/EDT)
603
60 ft
23.8 sq mi
42.8
11,448
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Compare With Nearby Zip Codes
| Metric | 03801 | 03840 | 03854 | 03904 | 03870 | 03903 |
|---|---|---|---|---|---|---|
| City | Portsmouth, NH | Greenland, NH | New Castle, NH | Kittery, ME | Portsmouth, NH | Eliot, ME |
| Population | 23,231 | 4,070 | 948 | 8,310 | 5,092 | 6,978 |
| Median Income | $106,520 | $147,132 | $193,558 | $74,551 | $127,772 | $100,472 |
| Home Value | $647,500 | $595,100 | $1,612,700 | $415,700 | $927,600 | $465,100 |
| Cost of Living | 183 | 198 | 250 | 117 | 250 | 140 |
| Median Age | 42.8 | 50.4 | 56.8 | 48.2 | 53.5 | 49.4 |
Cost of Living
100 = National Average. Portsmouth's cost of living is 83% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
6.1x
Demographics
Zip code 03801 has a population of 23,231 people with a median age of 42.8. There are 11,448 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Portsmouth (03801) population trend from 2010 to 2024
↑ 57.3%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
81°F
16°F
51 in
65 in
Portsmouth experiences warm summers with average highs around 81°F. Winters are cold with lows averaging 16°F. With 65 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$647,500
Median Household Income
$106,520
With 11,448 housing units across 23.8 square miles, 03801 has a housing density of 481 units per square mile. The home price-to-income ratio is 6.1x.
Location & Geography
Latitude
43.0748°
Longitude
-70.8054°
Land Area
23.8 sq mi
Water Area
5.4 sq mi
Nearby Zip Codes
Zip codes closest to 03801 (Portsmouth, NH) with distances:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 03801's $106,520. A way to compare Portsmouth to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 03801 (Portsmouth, NH). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Portsmouth, New Hampshire?
Portsmouth, New Hampshire uses zip code 03801.
What county is zip code 03801 in?
Zip code 03801 is located in Rockingham County, New Hampshire.
What is the population of zip code 03801?
The population of zip code 03801 is 23,231 with a median age of 42.8.
Is 03801 in Portsmouth, New Hampshire?
Yes, zip code 03801 is in Portsmouth, Rockingham County, New Hampshire. The area code is 603.
Frequently Asked Questions
What city is zip code 03801 in?
Zip code 03801 is in Portsmouth, New Hampshire. It is part of Rockingham County and uses the Eastern (EST/EDT) timezone.
What is zip code 03801?
Zip code 03801 is a U.S. postal code in Portsmouth, New Hampshire (Rockingham County). It has a population of 23,231 and covers 23.8 square miles.
What is the population of zip code 03801?
The population of zip code 03801 (Portsmouth, NH) is 23,231 with a median age of 42.8. There are approximately 11,448 housing units in this area.
What is the median income in zip code 03801?
The median household income in zip code 03801 (Portsmouth, NH) is $106,520 per year. The cost of living index is 183 (100 = national average).
What is the average home price in zip code 03801?
The median home value in zip code 03801 (Portsmouth, NH) is $647,500. The cost of living index is 183 compared to the national average of 100.
What county is zip code 03801 in?
Zip code 03801 is located in Rockingham County, New Hampshire. The primary city is Portsmouth.
What is the area code for zip code 03801?
Zip code 03801 in Portsmouth, NH uses area code 603. It is located in the Eastern (EST/EDT) timezone.
Is zip code 03801 a good place to live?
Zip code 03801 (Portsmouth, NH) has a cost of living index of 183 (100 = national average), a median household income of $106,520, and median home values of $647,500. The median age is 42.8. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 03801?
The cost of living index for zip code 03801 (Portsmouth, NH) is 183, where 100 represents the national average. This area is above the national average. Median home value: $647,500.
What schools serve zip code 03801?
Zip code 03801 in Portsmouth, New Hampshire is served by the local school district of Rockingham County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.