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).
... there are 16,146 people, 5,480 households, and 4,197 families residing in the town. The population density is 1,058.4/km² (2,740.4/mi²). There are 5,574 ...