Allamuchy is a township in Warren County, New Jersey, home to about 5,427 people across 20 square miles. Its ZIP code is 07820, and parts of 07821, 07838 and 07840 are in Allamuchy too.
Homes sold for a median of $292 per square foot across 3 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
All in Allamuchy
Mostly Hopatcong; part is in Allamuchy
Mostly Independence; part is in Allamuchy
Mostly Hackettstown; part is in Allamuchy
Each card is that ZIP code’s whole market, including any part outside Allamuchy. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Allamuchy’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Newark Liberty International Airport (EWR)37 miles away |
|---|---|
| Nearest city of 250,000+ | Newark, NJ36 miles away |
| Nearest city of 1 million+ | New York, NY49 miles away |
Straight-line distances from the center of Allamuchy; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Allamuchy had 5,335 residents in the 2020 census, up 38% since 2000.
It’s the 364th largest of 565 towns in New Jersey by population.
Warren County grew from 37,781 residents in 1900 to 109,632 in 2020.
Warren County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 19°F. About 48.8 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Andover Aeroflex Ap, NJ weather station (10 miles away).
28,428 jobs at 2,286 businesses in Warren County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
3 doctors and other health care providers list an office in Allamuchy.
Nearest hospitals
Providers with an office here
| Physical and occupational therapists | 1 |
|---|---|
| Chiropractors | 2 |
| Pharmacies | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (3 nearby)
Grocery stores (1 nearby)
Pharmacies
Libraries (1 nearby)
Museums (1 nearby)
Theaters and performance venues (1 nearby)
Counts are within about 3 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1873.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Allamuchy Township School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Mountain Villa SchoolAllamuchy | Pre-K–2 | 173 | Public | 2.4 mi |
| Allamuchy Township SchoolAllamuchy | 3–8 | 253 | Public | 3.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Hackettstown, Hopatcong, Byram, Mount Olive, Independence, Liberty, Green, Washington Township (Morris County), Mansfield Township (Warren County), Andover, Andover Borough, Frelinghuysen and Hope.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.