ZIP Code 03801 — Portsmouth city, NH Demographics & Data

ZIP code 03801 covers Portsmouth, NH in Rockingham County with a population of about 23,231.

At a glance, the area shows median age of 42.8 versus a U.S. median of about 38.9.

It sits in telephone area code 603; U.S. House district NH-1; the BOSTON (MANCHESTER) media market.

Portsmouth, NH sits in a university / college context (near great bay community college (0.4 mi)). Expect stronger interest in student housing, rentals, walkability, transit, and a younger adult age mix versus typical suburban ZIPs.

Median household income in ZIP 03801 is about $106,520 — about 42% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 5.5%; unemployment rate near 2.0%; 63.4% of adults with a bachelor’s degree or higher (about 29.7 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Professional services, Healthcare, and Manufacturing; about 20.3% of workers reporting work-from-home (about 5.1 points above the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).

Median home value is about $647,500 — about 86% above the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,658 (about 43% above the U.S. median rent ($1,163)), and owner-occupancy near 53.1% (about 12.3 points below the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 03801 in Portsmouth, NH, a household would need roughly $178,000 in annual income under a 20% down, 30-year loan at 6.8% (illustrative), keeping housing costs near 28% of income. Estimated monthly PITI is about $4,159. That is about 67% above the local median household income ($106,520), so the median earner would likely stretch or need a larger down payment. Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.

FEMA’s National Risk Index rates natural-hazard risk for Portsmouth city, NH as Relatively Moderate (composite score 85.8), which is elevated versus much of the country. The strongest component scores on US5 are flood (89.1) and hurricane (83.8). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.

Climate normals for Portsmouth city, NH show little to no average snow and around 50.6 inches of annual precipitation.

IRS migration statistics show a net inflow of about 1,090 for ZIP 03801 (Portsmouth city, NH) on US5’s published series — a signal of people/tax filers moving in relative to those leaving. Inflows often track job growth, housing demand, or lifestyle migration; treat the figure as a directional indicator rather than a precise headcount.