| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Lobinstown | city | An Mhi | Ireland | 53.7866667 | -6.6480556 | 275 | 4161 |
| Loch Ceann | city | Tiobraid Arann | Ireland | 52.44 | -7.8825 | 311 | 2867 |
| Loch Garman | city | Loch Garman | Ireland | 52.3341667 | -6.4575 | 3 | 2744 |
| Loch Glinne | city | Ros Comain | Ireland | 53.8166667 | -8.55 | 242 | 1839 |
| Loch an Iuir | city | County Donegal | Ireland | 54.9972222 | -8.2908333 | 6 | 2307 |
| Loch an Iúir | city | County Donegal | Ireland | 54.9972222 | -8.2908333 | 6 | 2307 |
| Lockstown Lower | city | Cill Mhantain | Ireland | 53.0819444 | -6.5391667 | 800 | 4567 |
| Lockstown Upper | city | Cill Mhantain | Ireland | 53.0666667 | -6.5327778 | 856 | 4567 |
| Logatrina | city | Cill Mhantain | Ireland | 53.0652778 | -6.7136111 | 488 | 6107 |
| Loghill | city | Ciarrai | Ireland | 52.5944444 | -9.1947222 | 150 | 4227 |
| Loghill | city | County Limerick | Ireland | 52.4797222 | -8.9911111 | 170 | 5481 |
| Loghinny | city | Cill Chainnigh | Ireland | 52.7019444 | -7.4880556 | 498 | 3271 |
| Lohercannan | city | Ciarrai | Ireland | 52.2666667 | -9.7305556 | 88 | 2245 |
| Lomanagh | city | Ciarrai | Ireland | 51.8827778 | -9.4216667 | 462 | 2441 |
| Lombard's Cross Roads | city | Port Lairge | Ireland | 51.9808333 | -7.9 | 196 | 4785 |
| Lombardstown | city | | Ireland | 52.1166667 | -8.7833333 | 311 | 5188 |
| Lombardʼs Cross Roads | city | Port Lairge | Ireland | 51.9808333 | -7.9 | 196 | 4785 |
| Long Island Well | city | Laois | Ireland | 52.9552778 | -7.4902778 | 337 | 2783 |
| Longford | city | An Longfort | Ireland | 53.7333333 | -7.8 | 236 | 2535 |
| Longford | city | County Offaly | Ireland | 53.0613889 | -7.7444444 | 564 | 2673 |
| Longford | city | Laois | Ireland | 53.1261111 | -7.4919444 | 994 | 2757 |
| Longford Bridge | city | County Limerick | Ireland | 52.5413889 | -8.5211111 | 246 | 5475 |
| Longford Bridge | city | County Limerick | Ireland | 52.5605556 | -8.2341667 | 242 | 4115 |
| Longfordpass Bridge | city | Tiobraid Arann | Ireland | 52.6966667 | -7.6308333 | 442 | 2890 |
| Longfordpass North | city | Tiobraid Arann | Ireland | 52.7080556 | -7.6647222 | 433 | 2890 |
| Longhill Bridge | city | Cill Chainnigh | Ireland | 52.8613889 | -7.2988889 | 521 | 3016 |
| Longueville | city | | Ireland | 52.1333333 | -8.7333333 | 223 | 5184 |
| Longwood | city | An Mhi | Ireland | 53.4538889 | -6.9219444 | 269 | 5717 |
| Looscaun | city | | Ireland | 53.0333333 | -8.3333333 | 196 | 1757 |
| Loputo | city | | Ireland | 54.4833333 | -8.1333333 | 239 | 2263 |
| Lorrha | city | Tiobraid Arann | Ireland | 53.0905556 | -8.1211111 | 183 | 2784 |
| Loskeran | city | Port Lairge | Ireland | 52.0155556 | -7.6211111 | 452 | 2477 |
| Losset | city | Tiobraid Arann | Ireland | 52.6388889 | -8.1377778 | 987 | 2934 |
| Losset | city | County Donegal | Ireland | 55.0316667 | -7.8827778 | 531 | 2304 |
| Louggraigue House | city | Loch Garman | Ireland | 52.3086111 | -6.7594444 | 111 | 4023 |
| Lough | city | Gaillimh | Ireland | 53.375 | -9.5375 | 213 | 2731 |
| Lough | city | Cill Chainnigh | Ireland | 52.7627778 | -7.6233333 | 479 | 3154 |
| Lough | city | Laois | Ireland | 53.1241667 | -7.1958333 | 347 | 2764 |
| Lough | city | Loch Garman | Ireland | 52.2252778 | -6.3905556 | 3 | 3114 |
| Lough Nafurnace | city | Gaillimh | Ireland | 53.375 | -9.5375 | 213 | 2731 |
| Lough Nakey | city | County Donegal | Ireland | 55.0708333 | -7.6861111 | 209 | 2208 |
| Loughabor | city | Cill Dara | Ireland | 53.0533333 | -6.9375 | 252 | 7189 |
| Loughaclerybeg | city | Gaillimh | Ireland | 53.3483333 | -8.4661111 | 249 | 2871 |
| Loughamore | city | Gaillimh | Ireland | 53.3319444 | -9.7583333 | 374 | 1512 |
| Loughanavally | city | | Ireland | 53.4833333 | -7.5333333 | 469 | 3126 |
| Loughanayally | city | | Ireland | 53.4833333 | -7.5333333 | 469 | 3126 |
| Loughane | city | Corcaigh | Ireland | 51.8702778 | -8.0491667 | 127 | 4265 |
| Loughane East | city | Corcaigh | Ireland | 51.9502778 | -8.6141667 | 295 | 5209 |
| Loughanure | city | County Donegal | Ireland | 54.9972222 | -8.2908333 | 6 | 2307 |
| Loughaunbeg | city | Gaillimh | Ireland | 53.2405556 | -9.3952778 | 3 | 1217 |
| Loughbeg | city | Corcaigh | Ireland | 51.8263889 | -8.3183333 | 0 | 3348 |
| Loughcapple Bridge | city | Tiobraid Arann | Ireland | 52.4308333 | -7.6488889 | 167 | 2867 |
| Loughcurra | city | Gaillimh | Ireland | 53.1305556 | -8.9052778 | 72 | 2721 |
| Lougher | city | Ciarrai | Ireland | 52.1825 | -9.9913889 | 524 | 2049 |
| Lougher | city | An Mhi | Ireland | 53.6716667 | -6.4816667 | 144 | 4702 |
| Lougheraherk | city | County Donegal | Ireland | 54.7438889 | -8.6377778 | 1440 | 1955 |
| Loughfad Hill | city | County Donegal | Ireland | 54.8158333 | -8.4066667 | 6 | 1977 |
| Loughglinn | city | Ros Comain | Ireland | 53.8166667 | -8.55 | 242 | 1839 |
| Loughgur Cross | city | County Limerick | Ireland | 52.5138889 | -8.5080556 | 282 | 5475 |
| Loughlass | city | Laois | Ireland | 52.9558333 | -7.0930556 | 456 | 2897 |
| Loughlinstown | city | Baile Atha Cliath | Ireland | 53.2438889 | -6.1330556 | 49 | 61512 |
| Loughmoe | city | Tiobraid Arann | Ireland | 52.7555556 | -7.8266667 | 357 | 2846 |
| Loughrea | city | Gaillimh | Ireland | 53.1969444 | -8.5669444 | 344 | 2884 |
| Loughros | city | County Donegal | Ireland | 55.0730556 | -7.6716667 | 249 | 2208 |
| Loughshinny | city | Baile Atha Cliath | Ireland | 53.5491667 | -6.0827778 | 0 | 17155 |
| Loughtally | city | Tiobraid Arann | Ireland | 52.3530556 | -7.7833333 | 144 | 3396 |
| Loughtown | city | County Leitrim | Ireland | 53.9691667 | -7.9619444 | 246 | 1404 |
| Louisburgh | city | Maigh Eo | Ireland | 53.7666667 | -9.8166667 | 36 | 967 |
| Loumanagh | city | Corcaigh | Ireland | 52.1452778 | -9.0988889 | 528 | 5184 |
| Loumore | city | Corcaigh | Ireland | 51.9055556 | -8.4225 | 203 | 5215 |
| Louth | city | County Louth | Ireland | 53.9486111 | -6.5413889 | 124 | 9717 |
| Lower Ballycotteen | city | An Clar | Ireland | 52.9683333 | -9.4072222 | 265 | 1574 |
| Lowertown | city | Corcaigh | Ireland | 51.5244444 | -9.6022222 | 124 | 3289 |
| Lowry's Bridge | city | Port Lairge | Ireland | 52.2852778 | -7.3841667 | 183 | 4687 |
| Lowryʼs Bridge | city | Port Lairge | Ireland | 52.2852778 | -7.3841667 | 183 | 4687 |
| Lowtown | city | Ros Comain | Ireland | 53.3652778 | -8.1197222 | 321 | 1862 |
| Lowtown | city | Cill Mhantain | Ireland | 52.9744444 | -6.7358333 | 616 | 5095 |
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