40°54′49″N 73°06′20″W / 40.913681°N 73.105634°W

South Setauket is a locality in Suffolk County, New York, two miles south of Setauket.: 241 It is served by the Three Village Central School District.[citation needed] South Setauket shares a ZIP Code with Centereach and is served by the Centereach Postal Office.[citation needed]
In 1869, a "Free Christian" church was erected in the locality.: 241 In March 2024, Northville Industries proposed a plan to either create three mega-warehouses or multifamily housing there.
A small, curved hill known locally as "The Wall" stretches from South Setauket to the western end of the Stony Brook University campus.