ZIP Code 03820 — Dover city, NH Demographics & Data

ZIP code 03820 covers Dover, NH in Strafford County with a population of about 33,150.

At a glance, the area shows median age of 37.6 (near the U.S. median).

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

Median household income in ZIP 03820 is about $92,793 — about 23% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 8.1%; unemployment rate near 4.2%; 49.2% of adults with a bachelor’s degree or higher (about 15.5 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Manufacturing, Healthcare, and Education; about 17.6% of workers reporting work-from-home (about 2.4 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 $397,900 — about 14% above the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,405 (about 21% above the U.S. median rent ($1,163)), and owner-occupancy near 51.4% (about 14.0 points below the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 03820 in Dover, NH, a household would need roughly $110,000 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 $2,556. That is about 19% above the local median household income ($92,793), 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 Dover city, NH as Relatively Low (composite score 64.1), which is near the middle of the national distribution. The strongest component scores on US5 are hurricane (76.6) and flood (76.0). 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 Dover city, NH show little to no average snow and around 47.8 inches of annual precipitation.

IRS migration statistics show a net inflow of about 1,555 for ZIP 03820 (Dover 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.