N
- Nathan Island, Little Nathan : The main islands forming The Kingdom of Nathan
- Navarone, fictional Greek Island in "The Guns of Navarone (novel)" and the film based on it
- Nepenthe, in the 1917 novel South Wind, located off the coast of Italy in the Tyrrhenian Sea; a thinly fictionalized Capri
- Neri's Island: Neri's home in Ocean Girl
- Neverland: an island that apparently exists outside of time, as its inhabitants never age or die, from the Peter Pan books and movies
- New America: an island northwest of Greenland in The Adventures of Captain Hatteras by Jules Verne
- N. Sanity Island: the home of Crash Bandicoot in the video game of the same title
- Isle of Naboombu: kingdom of anthropomorphic animals in the Disney film Bedknobs and Broomsticks
- Nigger Island in Ten Little Niggers by Agatha Christie (in later editions the name was changed to "Indian Island" or "Soldier Island")
- Nollop in Ella Minnow Pea (2001) by Mark Dunn is an island off the coast of the U.S. state of South Carolina
- Nomanisan Island: widely accepted term for the island in The Incredibles
- Nontoonyt Island: from the adventure computer game Leisure Suit Larry Goes Looking for Love (in Several Wrong Places)
- Nowhere Island: Setting of Mother 3
- Númenor: home of the Dúnedain before their downfall in J. R. R. Tolkien's Middle-earth
Read more about this topic: List Of Fictional Islands