Phantom islands are islands that are believed to exist and appear on maps for a period of time (sometimes centuries), and they are removed after they are proven not to exist (or the general population stops believing that they exist).
- Brazil (mythical island) also known as High Brasil, Hy-Brazil and Huy Brasil
- St. Brendan's Island
- Mayda
- Antillia (The Island of the Seven Cities)
- Buss Island
- Estotiland
- Frisland
- Bra
- Isle of Demons
- Cockaigne
- Īle Philippaux
- Morrell Island and Byers Island, west of Hawaii