A
- The Abarat: 25 islands in an archipelago, one for each hour and one for all the hours, from the series The Books of Abarat by Clive Barker
- Absolom: a prison island in the movie Escape from Absolom
- Aepyornis Island: an atoll near Madagascar, in H. G. Wells' story by that name.
- Al Amarja: Mediterranean island state in the Over the Edge roleplaying game
- Alabasta: An island controlled by Crocodile in the OnePiece manga series
- Alca/Penguin Island: an island off the northern shore of Europe, where penguins were transformed into humans (in fact, a satirical analogue of France) in the 1908 novel L'île des Pingouins by Anatole France.
- Altruria: from the novel A Traveler from Altruria by William Dean Howells
- Amity Island: from the book and film Jaws
- Angel Island: a major location in the Sonic the Hedgehog series of video games
- Angel Island: an island in the Pacific Ocean in Inez Haynes Gillmore's novel of the same name
- Ape Island: from The Simpsons
- Ape Atol: from The World OF Gaylenor
- Cannabis Isle: from MarijuanaScape
- BluntIsland: from MarijuanaScape
- Crack Atol: from MarijuanaScape
- Atoll K: from Laurel and Hardy's last movie
- August Bank Holiday Island: a fictional Commonwealth nation featured in the Goodies, found 'between Easter Island and Christmas Island'. In the Commonwealth Games, August Bank Holiday Island won and took over the Commonwealth Nations.
- Avalon from Arthurian legend
- Azkaban: island prison in the Harry Potter series
Read more about this topic: List Of Fictional Islands