Frelinghuysen is a township in Warren County, New Jersey, home to about 2,137 people across 24 square miles. Its ZIP code is 07846, and parts of 07821, 07825 and 07860 are in Frelinghuysen too.
Homes sold for a median of $283 per square foot across 3 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
All in Frelinghuysen
Mostly Hopatcong; part is in Frelinghuysen
Mostly Blairstown; part is in Frelinghuysen
Mostly Newton; part is in Frelinghuysen
Each card is that ZIP code’s whole market, including any part outside Frelinghuysen. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Frelinghuysen’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)44 miles away |
|---|---|
| Closer regional airport | Lehigh Valley International Airport (ABE)37 miles away |
| Nearest city of 250,000+ | Newark, NJ42 miles away |
| Nearest city of 1 million+ | New York, NY55 miles away |
Straight-line distances from the center of Frelinghuysen; 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.
Frelinghuysen had 2,199 residents in the 2020 census, up 6% since 2000.
It’s the 482nd 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 (9 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).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Parks (2 nearby)
Grocery stores
Libraries
Museums (2 nearby)
Theaters and performance venues (2 nearby)
Counts are within about 3.5 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.
Public schools here are run by Ridge and Valley Charter School. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Ridge and Valley Charter SchoolFrelinghuysen | K–8 | 134 | Charter | 2.1 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 Newton, Hopatcong, Byram, Hampton Township, Blairstown, Stillwater, Andover, Fredon, Green, Hope, Allamuchy, Hardwick, Frankford and Andover Borough.
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.