| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Lu | city | County Louth | Ireland | 53.9486111 | -6.5413889 | 124 | 9717 |
| Lubber | city | County Donegal | Ireland | 54.9705556 | -7.7063889 | 236 | 2161 |
| Lubhaidh | city | County Louth | Ireland | 53.9486111 | -6.5413889 | 124 | 9717 |
| Lucan | city | Baile Atha Cliath | Ireland | 53.3591667 | -6.4388889 | 157 | 88470 |
| Luddan | city | County Donegal | Ireland | 55.1161111 | -7.4511111 | 488 | 1934 |
| Lug | city | County Offaly | Ireland | 53.2111111 | -7.8608333 | 242 | 2657 |
| Lugdoon | city | Sligeach | Ireland | 54.2308333 | -8.7997222 | 314 | 2121 |
| Luggacurren | city | Laois | Ireland | 52.9466667 | -7.1297222 | 498 | 2798 |
| Lugglass Lower | city | Cill Mhantain | Ireland | 53.0658333 | -6.5552778 | 977 | 4642 |
| Lugglass Upper | city | Cill Mhantain | Ireland | 53.0666667 | -6.5330556 | 856 | 4567 |
| Lughil | city | Cill Dara | Ireland | 53.1102778 | -7.0616667 | 239 | 5144 |
| Lughinny | city | Cill Chainnigh | Ireland | 52.7019444 | -7.4880556 | 498 | 3271 |
| Lugmeeltan | city | County Leitrim | Ireland | 54.1852778 | -8.1916667 | 531 | 1459 |
| Lugnadeffa | city | Sligeach | Ireland | 54.2022222 | -8.5855556 | 328 | 2357 |
| Lugnagall | city | Sligeach | Ireland | 54.3288889 | -8.4225 | 715 | 2595 |
| Lugnagun Great | city | Cill Mhantain | Ireland | 53.15 | -6.4755556 | 1049 | 4628 |
| Lugnaskeagh | city | Cill Mhantain | Ireland | 53.1066667 | -6.4894444 | 1217 | 4561 |
| Luimneach | city | County Limerick | Ireland | 52.6647222 | -8.6230556 | 78 | 4913 |
| Lukeswell | city | Cill Chainnigh | Ireland | 52.3991667 | -7.1783333 | 482 | 3326 |
| Lullybeg | city | Cill Dara | Ireland | 53.2647222 | -6.9688889 | 239 | 6356 |
| Lumcloon Bridge | city | County Offaly | Ireland | 53.2269444 | -7.7913889 | 213 | 2657 |
| Lumcloon Cross Roads | city | County Offaly | Ireland | 53.2238889 | -7.8216667 | 219 | 2657 |
| Lumnagh | city | Gaillimh | Ireland | 53.4175 | -9.0544444 | 68 | 2441 |
| Lurgan | city | Gaillimh | Ireland | 53.2016667 | -8.355 | 252 | 2884 |
| Lurgan | city | County Offaly | Ireland | 53.3733333 | -7.7066667 | 246 | 2759 |
| Lurgan | city | County Louth | Ireland | 53.925 | -6.3777778 | 0 | 7660 |
| Lurganboy | city | County Leitrim | Ireland | 54.3147222 | -8.1963889 | 262 | 1377 |
| Lurganboy | city | County Donegal | Ireland | 55.1233333 | -7.5883333 | 360 | 1940 |
| Lurganboy | city | County Monaghan | Ireland | 54.1216667 | -7.1941667 | 357 | 3086 |
| Lurganearly | city | County Monaghan | Ireland | 54.1583333 | -6.6388889 | 482 | 6008 |
| Lurgangreen | city | County Louth | Ireland | 53.9433333 | -6.3838889 | 0 | 7660 |
| Lurrig | city | Corcaigh | Ireland | 51.8527778 | -8.1522222 | 219 | 4825 |
| Lusca | city | Baile Atha Cliath | Ireland | 53.5280556 | -6.1691667 | 49 | 95565 |
| Lusk | city | Baile Atha Cliath | Ireland | 53.5280556 | -6.1691667 | 49 | 95565 |
| Luska | city | Tiobraid Arann | Ireland | 52.9533333 | -8.2658333 | 459 | 2073 |
| Luskin's Bridge | city | Corcaigh | Ireland | 51.9363889 | -8.77 | 341 | 5209 |
| Luskinʼs Bridge | city | Corcaigh | Ireland | 51.9363889 | -8.77 | 341 | 5209 |
| Luttrell's Cross Roads | city | Baile Atha Cliath | Ireland | 53.4486111 | -6.2947222 | 134 | 95212 |
| Luttrellstown | city | Baile Atha Cliath | Ireland | 53.3738889 | -6.4322222 | 124 | 88470 |
| Luttrellʼs Cross Roads | city | Baile Atha Cliath | Ireland | 53.4486111 | -6.2947222 | 134 | 95212 |
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