| Place Name | Civil Parish | Situation |
| Apple Island | Beagh | In Loughcooter, Parish of Beagh, Barony of Kiltartan and County Galway. |
| Aughinish | Kinvarradoorus | On the West of the townland Geehy North, parish Kinvarra, Barony Kiltartan and County Galway. |
| Avery Island | Moyrus | In the W. of Mason Island |
| Boghilmore | Moycullen | In Lough Corrib, N.E. of the parish |
| Brannock Islands | Arran | W. of Arranmore |
| Bush Island | Lough Mask | North East end of Lough Mask |
| Bushy Island | Clonfert | Bounded by the Shannon. |
| Castle Island | Beagh | In Lough Cooter, Parish of Beagh, Barony of Kiltartan and County Galway. |
| Clonfert Butson | Clonfert | Bounded on the N. by the River Shannon, on the E. by the River Shannon, Carty and Killmacshane on the W. by Clonfert Demesne Bog and Srahene – it is also bounded on the N. by Clonfert Demesne Bog and by Clonfert Seymour detached and on the S. by Little Abbeyland, Clonfert Demesne and Clonfert Seymour detached. |
| Coorinch | Clonfert | Bounded by the Shannon. |
| Costello's Island | Clonfert | Bounded by the Shannon. |
| Craghalan | Clonfert | Bounded by the Shannon. |
| Crappagh | Kilcummin | An island which belongs to Lettermullen. |