Residential delivery area · New Jersey
ZIP Code 07840: Hackettstown, NJ
ZIP code 07840 uses the postal name Hackettstown, New Jersey and lies mostly in Warren County (76% of its land) with the rest in Morris County (Census 2020 ZIP-county file). About 32,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $105,866 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Hackettstown (10%), Beattystown (8%), Panther Valley (7%) and Vienna (5%), and 2% in smaller places; 69% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Hackettstown · its only residential ZIP
- County
- Warren County (76%); Morris County (24%)
- Census places
- Hackettstown (10%); Beattystown (8%) census-designated place; Panther Valley (7%) census-designated place; Vienna (5%) census-designated place
- Metro area
- Allentown-Bethlehem-Easton, PA-NJ
- House district
- NJ-7 119th Congress
- State
- New Jersey
- Time zone
- Eastern
- Land area
- 37.3 sq mi · 860 people per sq mi
Where is ZIP code 07840?
07840 centers on 40.860°, -74.832° and covers 37.3 square miles of land plus 0.4 of water. It borders 11 ZIP codes: 07880, 07870, 07828, 07838, 07820, 07853, 07865, 07836, 07863, 07874 and more.
The map draws ZIP code areas only. For the streets inside 07840, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 07840 compare with the rest of Warren County?
| Measure | 07840 | In Warren County | In NJ |
|---|---|---|---|
| People (ACS 2020-2024) | 32,105 | 1st of 22 | 81st of 598 |
| Median household income | $106k | 11th of 14 | 280th of 476 |
| Median home value | $396k | 8th of 16 | 339th of 515 |
Its median household income is higher than in 85% of U.S. residential ZIP codes, and it is denser than 77% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 07840?
The 2020 Census counted 31,255 people in 07840; the ACS, which samples households over 2020-2024, estimates 32,105. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 32,105
- 2020 Census count
- 31,255
- Households
- 12,768
- Median age
- 43.1
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 07840?
Of the 32,105 people the ACS estimates in 07840, 20.0% are under 18 and 17.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (68.2%), then Hispanic or Latino (18.1%).
- Under 1820.0%
- 18 to 6462.4%
- 65 and older17.6%
- White, not Hispanic68.2%
- Hispanic or Latino18.1%
- Asian, not Hispanic5.9%
- Black, not Hispanic5.6%
- Other or two or more2.2%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 07840 earn?
Median household income is $105,866 (ACS 2020-2024), the 11th highest of the 14 ranked ZIP codes in Warren County.
- Median household income
- $105,866
- Income per person
- $53,709
- Below the poverty line
- 6.4%
- Unemployed (of the labor force)
- 7.3%
- Adults 25+ with a bachelor's degree
- 49.6%
- Adjusted gross income per tax return, 2022
- $92,13515,950 returns; wages 74% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 07840?
FHFA's house price index for 07840, built from repeat sales and appraisals of the same homes, rose 77% from 2015 to 2025 and rose 58% from 2020 to 2025, and moved +4.4% in 2025.
- Median home value (owners' estimate)
- $396,100
- Median gross rent
- $1,487
- Homes owned by their occupants
- 69.7%
- Housing units
- 13,021
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 07840?
758 business establishments had a location in this ZIP code in 2023, 19 fewer than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance129
- Retail trade113
- Other services (except public administration)79
- Construction74
- Accommodation and food services71
- Professional, scientific, and technical services69
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 07840?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 07880 | Vienna | 173 | – | 2.7 mi |
| 07870 | Schooleys Mountain | 34 | – | 3.9 mi |
| 07828 | Budd Lake | 15,461 | $103k | 4.3 mi |
| 07838 | Great Meadows | 3,727 | $122k | 4.6 mi |
| 07820 | Allamuchy | 0 | – | 5.0 mi |
| 07853 | Long Valley | 12,339 | $176k | 5.7 mi |
| 07865 | Port Murray | 2,825 | $108k | 5.7 mi |
| 07836 | Flanders | 11,694 | $152k | 6.5 mi |
| 07863 | Oxford | 3,819 | $94k | 7.5 mi |
| 07874 | Stanhope | 8,752 | $133k | 8.0 mi |
| 07821 | Andover | 9,662 | $142k | 8.4 mi |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.