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South River is a borough in Middlesex County, New Jersey, situated in the central part of the state along the waterway that gives it its name. The South River forms the borough's western edge, with the Old Bridge Turnpike running along its east side, and the community sits near the Raritan River, the New Jersey Turnpike, and Route 18. Its population was about 16,118 at the 2020 census, spread across a compact borough that functions as one of central New Jersey's older, close-in communities. The borough's history is a story of municipal evolution. What is now South River began as the town of Washington, formed within East Brunswick Township in 1870, before incorporating as an independent borough in 1898. That transformation reflected the community's growth as a small industrial and residential center along the river, and its dense, pre-war street grid still reflects that era of development. Today South River is a diverse, family-oriented community with a PreK-12 public school district serving about 2,500 students. Local recreation centers on Daley's Pond Recreation Area and War Memorial Park, with the Raritan River and Raritan Bay nearby for boating and fishing. The borough's location places East Brunswick and Sayreville less than two miles away and puts New Brunswick within easy reach by bus, while the Turnpike and Route 18 open the broader region. Its older housing stock — single-family homes, twins, and multi-family buildings on compact lots — offers some of the more approachable options in the county. For buyers, South River offers a walkable, community-centered borough with practical access to Middlesex County's job centers and a long-established, river-named identity.

Population 16,118

County Middlesex

Active Listings 103

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Frequently Asked Questions

What county is South River, New Jersey in?

South River is a borough in Middlesex County, New Jersey, located in the central part of the state near the Raritan River and just west of the New Jersey Turnpike.

How did South River get its name?

South River takes its name from the South River, the waterway that forms the borough's western edge. The community was originally the town of Washington within East Brunswick Township before incorporating as an independent borough in 1898.

What school district serves South River?

South River is served by the South River Public Schools, a comprehensive PreK-12 district with four schools and roughly 2,500 students. It includes elementary schools, a middle school, and South River High School.

When was South River incorporated?

South River was incorporated as an independent borough on February 28, 1898, replacing the town of Washington, which had been formed within East Brunswick Township back in 1870. The change reflected the community's growth into a distinct residential center.

What parks and recreation does South River have?

South River offers Daley's Pond Recreation Area and War Memorial Park, among numerous green spaces in and around the borough. The Raritan River and Raritan Bay are short drives away for kayaking, boating, and fishing.

How is the commute from South River?

South River sits near the New Jersey Turnpike and Route 18, less than two miles from East Brunswick and Sayreville, with local bus service to New Brunswick and surrounding towns. The location makes it convenient for regional commuters.

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