South Amboy is a city in Middlesex County, New Jersey, home to about 9,989 people across 1.5 square miles. Its ZIP code is 08879.
Homes sold for a median of $360 per square foot in the three months ending August 2026, a buyer’s market.
Mostly South Amboy; also Sayreville and Old Bridge
Each card is that ZIP code’s whole market, including any part outside South Amboy. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up South Amboy’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)16 miles away |
|---|---|
| Nearest city of 250,000+ | Newark, NJ19 miles away |
| Nearest city of 1 million+ | New York, NY22 miles away |
Straight-line distances from the center of South Amboy; 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.
South Amboy had 9,411 residents in the 2020 census, up 19% since 2000.
It’s the 250th largest of 565 towns in New Jersey by population.
Middlesex County grew from 79,762 residents in 1900 to 863,162 in 2020.
Middlesex County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 87°F in summer, and winter lows average 23°F. About 49.5 inches of rain and melted snow fall in a typical year, with about 29 inches of snow.
Source: NOAA 1991–2020 climate normals, New Brunswick 3 Se, NJ weather station (8 miles away).
434,143 jobs at 22,314 businesses in Middlesex County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
107 doctors and other health care providers list an office in South Amboy.
Nearest hospitals
Providers with an office here
| Primary care doctors | 11 |
|---|---|
| Specialist doctors | 3 |
| Dentists | 18 |
| Nurse practitioners and physician assistants | 7 |
| Mental health providers | 54 |
| Physical and occupational therapists | 6 |
| Chiropractors | 8 |
| Pharmacies | 6 |
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 (4 nearby)
Grocery stores
Pharmacies
Libraries
Museums
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.
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 Sayreville School District, South Amboy School District, Old Bridge Township School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Project Before at Selover SchoolSouth Amboy | Pre-K | 233 | Public | 0.4 mi |
| South Amboy ElementarySouth Amboy | Pre-K–5 | 584 | Public | 1.2 mi |
| Memorial Elementary SchoolLaurence Harbor | K–5 | 388 | Public | 1.9 mi |
| South Amboy Middle/High SchoolSouth Amboy | 6–12 | 616 | Public | 1.2 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 Sayreville and Old Bridge.
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.