| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Illies | city | County Donegal | Ireland | 55.1483333 | -7.3319444 | 492 | 2297 |
| Imlick | city | County Donegal | Ireland | 54.9713889 | -7.4163889 | 9 | 11802 |
| Inbhear | city | County Donegal | Ireland | 54.6519444 | -8.2833333 | 3 | 1641 |
| Inch | city | County Donegal | Ireland | 55.0702778 | -7.4805556 | 3 | 1626 |
| Inishnaneill | city | County Donegal | Ireland | 55.2330556 | -7.2763889 | 236 | 2180 |
| Inver | city | County Donegal | Ireland | 54.6519444 | -8.2833333 | 3 | 1641 |
| Irineragh | city | County Donegal | Ireland | 54.9511111 | -7.6636111 | 91 | 2103 |
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