Long Island is located in the southeastern part of New York, Percy Jackson's home state, aside the Atlantic Ocean. To the north is Long Island Sound. Long Island is connected to New York City by various bridges and the Long Island Rail Road. Camp Half-Blood is said to be located here, at 3.141 Farm Road, Montauk. Sally Jackson also rents a small beach house on the shoreline where she sometimes takes Percy during the summer. Long Island is also where Sally met Poseidon. It is also briefly mentioned in the Kane Chronicles, where a strange magical frequency was emitting from that area.
Long Island is home to Camp Half-Blood and is a location in every single book.
Nico di Angelo, Reyna Ramírez-Arellano, and Gleeson Hedge go to Camp Half-Blood to stop the Twelfth Legion Fulminata from destroying the camp. The crew of the Argo II return to camp just as Gaea awakens and helps both Greeks and Romans fight her.
Long Island, namely Camp Half-Blood, is the primary setting of the story.
- Two of New York City's boroughs are on Long Island, Queens and Brooklyn.
- Long Island is the largest island in the continental United States.