| 100% | SOUTH | 5 | & 6D Island of the Outer Hebrides whose main settlement is Lochboisdale |
| 59% | MUCK | 4 | Island of the Inner Hebrides whose largest settlement is Port Mor |
| 43% | BENBECULA | 9 | Island of the Outer Hebrides, Scotland, between North Uist and South Uist |
| 37% | GOZO | 4 | Island of the Maltese archipelago whose capital, Victoria, is also known as Rabat |
| 37% | MONTSERRAT | 10 | Volcanic island of the Leeward Islands in the Caribbean whose de jure capital is Plymouth |
| 36% | LIMAPERU | 8 | Capital city whose main governmental building is known as the "House of Pizarro" |
| 35% | BUTE | 4 | Island in the Firth of Clyde whose only town is Rothesay |
| 35% | MULL | 4 | Island off the West coast of Scotland whose chief town is Tobermory |
| 35% | SKYE | 4 | Island of the Hebrides |
| 35% | IONA | 4 | Island of the Hebrides |
| 34% | IONA | 4 | Island of the Inner Hebrides |
| 34% | SARK | 4 | Island in the English Channel whose two main parts are linked by isthmus La Coupee |
| 34% | OLDBROWNS | 9 | Beatles song whose title is an item the singer is "steppin' out" of |
| 33% | SARK | 4 | Island in the English Channel whose two main parts are linked by the isthmus La Coupee |
| 33% | LESBOS | 6 | Greek island off the NW coast of Turkey whose capital is Mytilene |
| 33% | RUM | 3 | Island of the Inner Hebrides northwest of Eigg |
| 33% | TIREE | 5 | Island of the Inner Hebrides southwest of Coll |
| 33% | DODECANESE | 10 | Group of islands in the Aegean Sea whose capital is Rhodes |
| 33% | COLONSAY | 8 | Island of the Inner Hebrides, Scotland, north of Islay |
| 32% | KAL | 3 | Actor Penn whose character was written out of "House" so he could work at the White House |
| 32% | WHATSMYNAME | 11 | Fairy tale question whose answer is spelled out in the starts of 18-, 24-, 40- and 51-Across |
| 32% | TARA | 4 | Author Westover whose memoir is spelled out in the first letters of this puzzle's eight circled schools |
| 32% | SKYE | 4 | Largest island of the Inner Hebrides, Scotland |
| 32% | JAVA | 4 | Island of Indonesia whose capital is Jakarta |
| 31% | MALDIVES | 8 | Group of coral islands in the Indian Ocean whose capital is Male |
| 31% | RINGO | 5 | Rock star whose name is spelled out by the middle letters of 16-, 18-, 39-, 61- and 64-Across |
| 31% | KAUAI | 5 | Oldest of the main Hawaiian islands |