Long Island may refer to:

• Long Island in New York in the United States
• Long Island, a town in Maine in the United States
• Long Island (Wisconsin) , one of the Apostle Islands in Lake Superior in the United States
• Long Island in the Bahamas
• Long Island in Turkey
• the town of Long Island, Virginia in the United States
• Long Island, Nunavut in Canada
• Long Island, New South Wales , a locality in Sydney, Australia
• Long Island is a small island off the coast of Antigua.
• Cheung Chau, literally meaning Long Island, in Hong Kong