There's more than one place called Long Island:
Australia
- Long Island (New South Wales)
- Long Island (Queensland) – the closest island to the mainland in the Whitsunday Islands group
Bahamas
Canada
- Long Island, an island and lockstation on the Rideau Canal (locks #14-16) in Manotick, south of Ottawa-Gatineau
India
- Long Island (Andamans) - An island in the Andaman and Nicobar island chain
United States of America
- Long Island (Boston)
- Long Island (Kansas)
- Long Island (Maine)
- Long Island - in New York (state)
- Long Island (Virginia)
- Long Island (Wisconsin)
- Long Island (formerly Outer Long Island) as one of fourteen islands which comprise tiny Frenchboro, Maine.