ZIP code · Keene · New Hampshire · United States
ZIP code 03431 — Keene
ZIP code 03431 serves Keene, New Hampshire.
- Postal code
- 03431Single source Value from one source, not cross-checked.
- City
- Keene
- County
- Cheshire FIPS 33005
- State
- New Hampshire
- Country
- United States
- Coordinates
- 42.9627, -72.2955 — precision precise (locality)
View on OpenStreetMap - Population
- 25,035 (ZCTA, ACS 5-year)
- Population density
- 418 / sq mi
- Land area
- 60 sq mi (155.3 km²) (ZCTA, ACS 5-year)
- Median household income
- $78,196
- Per-capita income
- $39,574
- Median age
- 36.8
- Households
- 10,062
- Housing units
- 11,168
- Median home value
- $233,900
- Median gross rent
- $1,279 / month
- Congressional district
- NH-2 (119th Congress)
- USDA hardiness zone
- 5b (-15 to -10 °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 03431 with another ZIP · ZIPs within 25 miles · distance from 03431
Nearby localities
Map of ZIP code 03431
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 10°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 34 | 43 | 57 | 69 | 77 | 82 | 81 | 73 | 60 | 47 | 36 |
| Avg low °F | 10 | 11 | 20 | 30 | 41 | 51 | 56 | 54 | 47 | 36 | 27 | 18 |
| Precip in | 3.1 | 2.8 | 3.4 | 3.4 | 3.8 | 4.4 | 4.5 | 4.3 | 4.3 | 4.9 | 3.5 | 3.9 |
NOAA 1991–2020 climate normals from the nearest station: KEENE (2.2 mi) · NOAA NCEI
Places in ZIP 03431
- 15 schools
- 2 colleges & universities
- 5 hospitals & clinics
- 11 doctors & dentists
- 2 pharmacies
- 4 supermarkets
- 70 restaurants & cafés
- 9 bars & pubs
- 27 parks
- 14 playgrounds
- 9 gyms & sports centres
- 5 libraries
- 4 post offices
- 23 places of worship
- 10 banks
- 11 gas stations
- 2 EV charging stations
- 7 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