Zip Code 07840
Hackettstown, New Jersey — Warren County
📍 ZIP code 07840 is in Hackettstown, Warren County, New Jersey.
ZIP code 07840 is located in Hackettstown, Warren County, New Jersey. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 31,995. The area code for ZIP code 07840 is 908.
Quick Answer
Zip code 07840 is in Hackettstown, New Jersey (Warren County). It has a population of 31,995, median household income of $107,956, and median home value of $373,000.
Population
31,995
Income
$107,956
Home Value
$373,000
Climate
84°F / 19°F
About Zip Code 07840
Zip code 07840 is located in Hackettstown, New Jersey, within Warren County. Home to approximately 31,995 residents, this area sits at an elevation of 557 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 908.
The median household income is $107,956 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $373,000, and the cost of living index is 132 (32% above the national average of 100).
Summers average a high of 84°F while winters drop to 19°F. The area receives about 49 in of rain and 30 in of snow annually. The zip code covers 35.1 square miles of land area and 0.3 square miles of water.
Key Statistics
31,995
$107,956
$373,000
Eastern (EST/EDT)
908
557 ft
35.1 sq mi
42.9
12,974
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Compare With Nearby Zip Codes
| Metric | 07840 | 07838 | 07828 | 07865 | 07853 | 07836 |
|---|---|---|---|---|---|---|
| City | Hackettstown, NJ | Great Meadows, NJ | Budd Lake, NJ | Hackettstown, NJ | Long Valley, NJ | Flanders, NJ |
| Population | 31,995 | 3,495 | 14,723 | 3,284 | 12,360 | 12,104 |
| Median Income | $107,956 | $121,563 | $96,989 | $108,881 | $183,692 | $154,743 |
| Home Value | $373,000 | $409,600 | $433,200 | $373,500 | $601,000 | $517,800 |
| Cost of Living | 132 | 136 | 131 | 158 | 225 | 179 |
| Median Age | 42.9 | 42.2 | 37.7 | 33.9 | 44.3 | 44 |
Cost of Living
100 = National Average. Hackettstown's cost of living is 32% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
3.5x
Demographics
Zip code 07840 has a population of 31,995 people with a median age of 42.9. There are 12,974 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Hackettstown (07840) population trend from 2010 to 2024
↑ 38.7%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
84°F
19°F
49 in
30 in
Hackettstown experiences warm summers with average highs around 84°F. Winters are cold with lows averaging 19°F. The area receives about 30 in of snow per year.
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Housing & Economy
Median Home Value
$373,000
Median Household Income
$107,956
With 12,974 housing units across 35.1 square miles, 07840 has a housing density of 370 units per square mile. The home price-to-income ratio is 3.5x.
Location & Geography
Latitude
40.8542°
Longitude
-74.8353°
Land Area
35.1 sq mi
Water Area
0.3 sq mi
Nearby Zip Codes
Zip codes closest to 07840 (Hackettstown, NJ) with distances:
All Zip Codes in Hackettstown, NJ
Other zip codes serving Hackettstown:
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 07840's $107,956. A way to compare Hackettstown to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 07840 (Hackettstown, NJ). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Hackettstown, New Jersey?
Hackettstown, New Jersey uses zip code 07840 along with 1 other zip codes.
What county is zip code 07840 in?
Zip code 07840 is located in Warren County, New Jersey.
What is the population of zip code 07840?
The population of zip code 07840 is 31,995 with a median age of 42.9.
Is 07840 in Hackettstown, New Jersey?
Yes, zip code 07840 is in Hackettstown, Warren County, New Jersey. The area code is 908.
Frequently Asked Questions
What city is zip code 07840 in?
Zip code 07840 is in Hackettstown, New Jersey. It is part of Warren County and uses the Eastern (EST/EDT) timezone.
What is zip code 07840?
Zip code 07840 is a U.S. postal code in Hackettstown, New Jersey (Warren County). It has a population of 31,995 and covers 35.1 square miles.
What is the population of zip code 07840?
The population of zip code 07840 (Hackettstown, NJ) is 31,995 with a median age of 42.9. There are approximately 12,974 housing units in this area.
What is the median income in zip code 07840?
The median household income in zip code 07840 (Hackettstown, NJ) is $107,956 per year. The cost of living index is 132 (100 = national average).
What is the average home price in zip code 07840?
The median home value in zip code 07840 (Hackettstown, NJ) is $373,000. The cost of living index is 132 compared to the national average of 100.
What county is zip code 07840 in?
Zip code 07840 is located in Warren County, New Jersey. The primary city is Hackettstown.
What is the area code for zip code 07840?
Zip code 07840 in Hackettstown, NJ uses area code 908. It is located in the Eastern (EST/EDT) timezone.
Is zip code 07840 a good place to live?
Zip code 07840 (Hackettstown, NJ) has a cost of living index of 132 (100 = national average), a median household income of $107,956, and median home values of $373,000. The median age is 42.9. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 07840?
The cost of living index for zip code 07840 (Hackettstown, NJ) is 132, where 100 represents the national average. This area is above the national average. Median home value: $373,000.
What schools serve zip code 07840?
Zip code 07840 in Hackettstown, New Jersey is served by the local school district of Warren County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.