| County | Island | Population ** |
|---|---|---|
| Antrim | Rathlin | 70 |
| Donegal | Toraigh | 149 |
| Árainn Mhór | 543 | |
| Inis Bó Finne | 16 | |
| Inis Fraoigh | 7 | |
| An tOileán Rua | 7 | |
| Gabhla | 5 | |
| Sligo | Coney | 3 |
| Dernish | 1 | |
| Mayo | Clare Island | 111 |
| Inis Bigil | 39 | |
| Inishcuttle | 4 | |
| Inishlyre | 7 | |
| Clynish | 5 | |
| Inisgort | 1 | |
| Inishnakillew | 5 | |
| Islandmore | 1 | |
| Inishturk | 72 | |
| Claggan | 2 | |
| Beginis | 1 | |
| Galway | Inishbofin | 178 |
| Inis Mór | 763 | |
| Inis Meáin | 187 | |
| Inis Oírr | 262 | |
| Inis Trá Mhór | 1 | |
| Limerick | Foynes | 1 |
| Cork | Oileán Chléire | 129 |
| Sherkin | 108 | |
| Bere Island | 207 | |
| Heir | 27 | |
| Long | 12 | |
| Whiddy | 29 | |
| Dursey | 6 | |
| Total Population | 2960 |
**(according to the 2002 Census)