South River, NJ

South River is a Middlesex County borough named for the South River, a tributary of the Raritan. It was originally part of East Brunswick Township before becoming its own municipality, and the river shaped both its name and early settlement pattern. Today South River has local schools, compact neighborhoods, and access to central New Jersey employment corridors. It feels like an older working borough: modest, residential, and tied to the layered municipal geography of the Raritan River region.