ZIP code · Dover · New Hampshire · United States
ZIP code 03820 — Dover
ZIP code 03820 serves Dover, New Hampshire.
- Postal code
- 03820Single source Value from one source, not cross-checked.
- City
- Dover
- County
- Strafford FIPS 33017
- State
- New Hampshire
- Country
- United States
- Coordinates
- 43.1888, -70.8868 — precision precise (locality)
View on OpenStreetMap - Population
- 33,150 (ZCTA, ACS 5-year)
- Population density
- 1,215 / sq mi
- Land area
- 27.3 sq mi (70.7 km²) (ZCTA, ACS 5-year)
- Median household income
- $92,793
- Per-capita income
- $52,214
- Median age
- 37.6
- Households
- 15,021
- Housing units
- 15,460
- Median home value
- $397,900
- Median gross rent
- $1,540 / month
- Congressional district
- NH-1 (119th Congress)
- USDA hardiness zone
- 6a (-10 to -5 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
- Area code
- 603Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 03820 with another ZIP · ZIPs within 25 miles · distance from 03820
Nearby localities
Map of ZIP code 03820
Climate — monthly normals
Warmest month Jul (avg high 81°F), coldest Jan (avg low 15°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 36 | 43 | 55 | 66 | 75 | 81 | 80 | 72 | 60 | 48 | 38 |
| Avg low °F | 15 | 16 | 25 | 34 | 44 | 53 | 59 | 57 | 50 | 39 | 30 | 22 |
| Precip in | 3.4 | 3.5 | 4.4 | 4.2 | 3.8 | 4.3 | 3.8 | 3.4 | 3.9 | 4.8 | 4.0 | 4.5 |
NOAA 1991–2020 climate normals from the nearest station: DURHAM 2 N (2.4 mi) · NOAA NCEI
Places in ZIP 03820
- 11 schools
- 6 hospitals & clinics
- 10 doctors & dentists
- 3 pharmacies
- 6 supermarkets
- 77 restaurants & cafés
- 9 bars & pubs
- 19 parks
- 12 playgrounds
- 15 gyms & sports centres
- 1 libraries
- 1 post offices
- 17 places of worship
- 13 banks
- 11 gas stations
- 2 EV charging stations
- 4 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page