Andover Borough is a borough in Sussex County, New Jersey, home to about 728 people across 1.4 square miles. It has no ZIP code of its own: it’s part of 07821.
Homes sold for a median of $292 per square foot in the three months ending August 2026, a seller’s market.
Mostly Hopatcong; part is in Andover Borough
Each card is that ZIP code’s whole market, including any part outside Andover Borough. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Andover Borough’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)36 miles away |
|---|---|
| Nearest city of 250,000+ | Newark, NJ34 miles away |
| Nearest city of 1 million+ | New York, NY47 miles away |
Straight-line distances from the center of Andover Borough; 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.
Andover Borough had 595 residents in the 2020 census, down 10% since 2000.
It’s the 546th largest of 565 towns in New Jersey by population.
Sussex County grew from 24,134 residents in 1900 to 144,221 in 2020.
Sussex 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 (3 miles away).
32,211 jobs at 3,184 businesses in Sussex County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
39 doctors and other health care providers list an office in Andover Borough.
Nearest hospitals
Providers with an office here
| Primary care doctors | 3 |
|---|---|
| Dentists | 4 |
| Nurse practitioners and physician assistants | 2 |
| Mental health providers | 18 |
| Physical and occupational therapists | 11 |
| Chiropractors | 1 |
| 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 (1 nearby)
Grocery stores
Pharmacies
Libraries
Theaters and performance venues
Counts are within about 1 mile 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.
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Tranquility Adventist SchoolAndover | Pre-K–8 | 30 | Seventh-day Adventist | 2.2 mi |
Source: U.S. Department of Education, NCES: Common Core of Data for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Hopatcong, Byram, Green, Andover, Allamuchy and Frelinghuysen.
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.