Three Village Central School District is a school district located in Long Island, New York. It serves Setauket, East Setauket, Stony Brook, Poquott, Head of the Harbor, Old Field, and small portions of Port Jefferson, Saint James and South Setauket/Centereach. Its name came from the older, original "Three Villages" of Setauket, Stony Brook and Old Field after the merger of the Stony Brook and Setauket school districts in the 1960s.