| 100% | AVALON | 6 | A misty and mystical island |
| 45% | BALI | 4 | Indonesian island and a holiday destination |
| 43% | FIJI | 4 | Pacific island nation, and a bottled water brand |
| 43% | CASTAWAY | 8 | Tom Hanks and a volleyball stranded on an island |
| 42% | ILIN | 4 | Island and only place where Crateromys paulus, a critically endangered rat, lives |
| 41% | OFMAN | 5 | Isle ___, island on a sea between England and Ireland: 2 wds. |
| 40% | KEYWEST | 7 | Florida island ... or a hint to 17-, 24-, 52- and 65-Across |
| 39% | ATOLL | 5 | Island ring ... or, in three parts, a hint to 18-, 32-, 44- and 59-Across |
| 39% | SULLOMVOE | 9 | Sheltered inlet between North Mainland and Northmavine, Shetland Islands, housing a petroleum terminal |
| 38% | KONG | 4 | "___: Skull Island," a 2017 American Monster film starring Tom Hiddleston and Samuel L. Jackson |
| 37% | MILAZZO | 7 | City in Messina, Sicily; a departure point for ferries to the Aeolian Islands and Naples |
| 37% | SKYWARDSWORD | 12 | "The Legend of Zelda" game that features floating islands and a magic blade (2 wds.) |
| 37% | LEMUR | 5 | Primate with large eyes and a long tail that is endemic to the island of Madagascar |
| 36% | AMBON | 5 | Island of the Moluccas, Indonesia, on which occurred a 1942 World War II battle between Allied and Japanese forces |
| 36% | LUCIA | 5 | St. ___, Caribbean island that was a wedding destination for celeb couples like Matt Damon and Luciana Barroso |
| 36% | EERIE | 5 | Like a misty graveyard |
| 35% | EERIE | 5 | Spooky, like a misty graveyard |
| 35% | ATOLL | 5 | Many a South Seas island |
| 35% | MAROONED | 8 | Abandoned on a desolate island |
| 35% | STOOLS | 6 | Seats at a kitchen island |
| 35% | WAVE | 4 | Crasher on a desert island |
| 35% | SKYE | 4 | Terrier from a Hebrides island |
| 35% | MAROON | 6 | Strand on a desert island |
| 35% | MAROONING | 9 | Stranding on a deserted island |
| 35% | MAROONED | 8 | Stranded on a desert island |
| 35% | ATOLL | 5 | Many a Coral Sea island |
| 34% | OCCULT | 6 | Mystical and puzzling |
| 34% | STJOHN | 6 | A Virgin Island |
| 34% | ISLE | 4 | A small island |
| 34% | MARKS | 5 | A- and C+ |