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- Ramita de la Baya: "Twig in the Bay" a small island dividing America and Mexico in Red Dead Redemption
- R'lyeh: home of Cthulhu in H. P. Lovecraft's fiction
- Riten Kyo: from the video game Samurai Shodown Warrior's Rage 2
- Rockfort Island: from the video game Resident Evil Code: Veronica
- Roke Island: the wizard school in the Earthsea trilogy, by Ursula K. Le Guin
- Rokkenjima: from the visual novel Umineko no Naku Koro Ni
- Roo Island: an island in Neopia
- Round Island: from the video game Final Fantasy VII
- Rugged Island: from the sitcom Father Ted, next door to Craggy Island
Read more about this topic: List Of Fictional Islands