ZIP code · Hackettstown · New Jersey · United States
ZIP code 07840 — Hackettstown
ZIP code 07840 serves Hackettstown, New Jersey.
- Postal code
- 07840Single source Value from one source, not cross-checked.
- City
- Hackettstown
- County
- Warren FIPS 34041
- State
- New Jersey
- Country
- United States
- Coordinates
- 40.8529, -74.8343 — precision precise (locality)
View on OpenStreetMap - Population
- 31,995 (ZCTA, ACS 5-year)
- Population density
- 857 / sq mi
- Land area
- 37.3 sq mi (96.7 km²) (ZCTA, ACS 5-year)
- Median household income
- $107,956
- Per-capita income
- $54,394
- Median age
- 42.9
- Households
- 12,757
- Housing units
- 12,974
- Median home value
- $373,000
- Median gross rent
- $1,469 / month
- Congressional district
- NJ-7 (119th Congress)
- USDA hardiness zone
- 6b (-5 to 0 °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
- 908Telephone 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 07840 with another ZIP · ZIPs within 25 miles · distance from 07840
Map of ZIP code 07840
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 19°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 39 | 48 | 61 | 71 | 79 | 84 | 82 | 74 | 63 | 52 | 41 |
| Avg low °F | 19 | 20 | 28 | 38 | 48 | 57 | 62 | 60 | 52 | 42 | 32 | 25 |
| Precip in | 3.3 | 2.8 | 4.1 | 3.8 | 3.8 | 4.5 | 5.1 | 4.8 | 4.3 | 4.6 | 3.4 | 4.2 |
NOAA 1991–2020 climate normals from the nearest station: ANDOVER AEROFLEX AP (11.9 mi) · NOAA NCEI
Places in ZIP 07840
- 8 schools
- 1 colleges & universities
- 3 hospitals & clinics
- 7 doctors & dentists
- 6 supermarkets
- 45 restaurants & cafés
- 2 bars & pubs
- 8 parks
- 27 playgrounds
- 11 gyms & sports centres
- 4 libraries
- 3 post offices
- 13 places of worship
- 10 banks
- 13 gas stations
- 4 EV charging stations
- 5 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