Copiague Harbor is located south of Merrick Road (or Montauk Highway), off of South Great Neck Road in Suffolk County, New York, USA, on the South Shore of Long Island. It is sometimes referred to as Great Neck Landing;
Copiague Harbor is a small, community located on a southern peninsula of Copiague, primarily composed of larger size homes deeded belonging to a homeowner's association; Great South Bay Estates Homeowner's Association (GSBEHA). This affluent private community offers amenities including a mini-beach and mini-marina on a private lagoon.
It was created in the late 1960s intended as a private community, gated and guarded. From time to time residents have considered adding a gate and guard as originally intended.
Copiague Harbor is assigned to Copiague Public School District.