| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Gleann Aolain | city | Mayo | Ireland | 53.90 | -9.41 | 262 | 793 |
| Gleann Beithe | city | Kerry | Ireland | 52.06 | -9.94 | 295 | 942 |
| Gleann Bhaile Uí Mháille | city | Kilkenny | Ireland | 52.44 | -7.03 | 262 | 1507 |
| Gleann Bhairr | city | Donegal | Ireland | 55.16 | -7.60 | 354 | 1231 |
| Gleann Buí | city | Leitrim | Ireland | 54.29 | -8.12 | 830 | 1124 |
| Gleann Chaisell | city | Mayo | Ireland | 54.18 | -9.88 | 278 | 785 |
| Gleann Cheo | city | Donegal | Ireland | 55.16 | -7.80 | 183 | 1387 |
| Gleann Cholm Cille | city | Donegal | Ireland | 54.70 | -8.72 | 889 | 684 |
| Gleann Chuilinn Íochtarach | city | Mayo | Ireland | 54.18 | -9.73 | 232 | 409 |
| Gleann Crí | city | Wicklow | Ireland | 53.19 | -6.31 | 1669 | 4219 |
| Gleann Críthigh | city | Wicklow | Ireland | 53.19 | -6.31 | 1669 | 4219 |
| Gleann Cuilinn | city | Dun Laoghaire-Rathdown | Ireland | 53.22 | -6.21 | 830 | 21742 |
| Gleann Doimhin Ó Riagáin | city | Laois | Ireland | 53.11 | -7.53 | 830 | 969 |
| Gleann Domhain | city | Donegal | Ireland | 54.80 | -7.97 | 830 | 444 |
| Gleann Domhain | city | Donegal | Ireland | 54.97 | -7.96 | 830 | 304 |
| Gleann Fan | city | Kerry | Ireland | 52.10 | -10.43 | 0 | 587 |
| Gleann Fhaidhle | city | Wicklow | Ireland | 52.96 | -6.15 | 830 | 2026 |
| Gleann Gheis | city | Donegal | Ireland | 54.74 | -8.45 | 830 | 885 |
| Gleann Iartharach | city | Donegal | Ireland | 55.10 | -7.82 | 931 | 944 |
| Gleann Iolra | city | Mayo | Ireland | 54.30 | -9.44 | 830 | 394 |
| Gleann Lach | city | Donegal | Ireland | 54.76 | -8.66 | 344 | 324 |
| Gleann Leitreach | city | Offaly | Ireland | 53.10 | -7.65 | 987 | 742 |
| Gleann Lára | city | Mayo | Ireland | 53.96 | -9.50 | 830 | 667 |
| Gleann Lára | city | Mayo | Ireland | 54.29 | -9.99 | 62 | 1194 |
| Gleann Maghair | city | Cork | Ireland | 51.92 | -8.40 | 91 | 46220 |
| Gleann Teamhráin | city | Mayo | Ireland | 53.88 | -8.80 | 285 | 1446 |
| Gleann Trasna | city | Galway | Ireland | 53.41 | -9.51 | 396 | 309 |
| Gleann an Phréacháin | city | Cork | Ireland | 52.04 | -8.42 | 830 | 1229 |
| Gleann an Scáil | city | Galway | Ireland | 53.29 | -8.93 | 29 | 10380 |
| Gleann na Madadh | city | Galway | Ireland | 53.60 | -8.55 | 249 | 1462 |
| Gleann na Muaidhe | city | Mayo | Ireland | 54.24 | -9.70 | 180 | 323 |
| Gleanntán an Fheirmeora | city | Kildare | Ireland | 53.26 | -6.55 | 830 | 6724 |
| Gleannúir | city | Cork | Ireland | 52.19 | -8.36 | 144 | 1972 |