| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Loan | city | Kilkenny | Ireland | 52.84 | -7.21 | 830 | 3563 |
| Lobinstown | city | Meath | Ireland | 53.79 | -6.65 | 275 | 1813 |
| Loch Bairrín | city | Kilkenny | Ireland | 52.58 | -7.16 | 232 | 2490 |
| Loch Ceann | city | Ireland | 52.44 | -7.88 | 311 | 1820 | |
| Loch Dhoire Thoirc | city | Donegal | Ireland | 54.74 | -8.64 | 1669 | 455 |
| Loch Garman | city | Wexford | Ireland | 52.33 | -6.46 | 3 | 20797 |
| Loch Glinne | city | Roscommon | Ireland | 53.82 | -8.55 | 242 | 1308 |
| Loch Sionnach | city | Fingal | Ireland | 53.55 | -6.08 | 0 | 13542 |
| Loch Sionnaigh | city | Fingal | Ireland | 53.55 | -6.08 | 0 | 13542 |
| Loch an Iúir | city | Donegal | Ireland | 55.00 | -8.29 | 6 | 2229 |
| Loch na hOili | city | Mayo | Ireland | 54.17 | -9.92 | 75 | 878 |
| Loch na mBreatnach | city | Wexford | Ireland | 52.27 | -6.38 | 0 | 3291 |
| Lochcarrig | city | Cork | Ireland | 51.88 | -8.18 | 246 | 10918 |
| Lockstown Lower | city | Wicklow | Ireland | 53.08 | -6.54 | 830 | 1103 |
| Lockstown Upper | city | Wicklow | Ireland | 53.07 | -6.53 | 856 | 935 |
| Log Míoltan | city | Leitrim | Ireland | 54.19 | -8.19 | 830 | 791 |
| Log an Churraigh | city | Laois | Ireland | 52.95 | -7.13 | 830 | 1422 |
| Log na Giumhaisi | city | Ireland | 52.03 | -7.62 | 830 | 4476 | |
| Log na nGall | city | Sligo | Ireland | 54.33 | -8.42 | 830 | 2451 |
| Loganstown | city | Meath | Ireland | 53.55 | -6.75 | 213 | 7155 |
| Logatrina | city | Wicklow | Ireland | 53.07 | -6.71 | 830 | 2494 |
| Loghill | city | Kerry | Ireland | 52.59 | -9.19 | 150 | 1284 |
| Loghill | city | Ireland | 52.48 | -8.99 | 170 | 2571 | |
| Loghinny | city | Kilkenny | Ireland | 52.70 | -7.49 | 830 | 1350 |
| Logleagh | city | Ireland | 52.18 | -8.01 | 830 | 938 | |
| Loher | city | Kerry | Ireland | 51.80 | -10.18 | 78 | 372 |
| Lohercannan | city | Kerry | Ireland | 52.27 | -9.73 | 88 | 22776 |
| Loiscreán | city | Ireland | 52.02 | -7.62 | 830 | 1353 | |
| Lomanagh | city | Kerry | Ireland | 51.88 | -9.42 | 830 | 426 |
| Lombard's Cross Roads | city | Ireland | 51.98 | -7.90 | 196 | 7444 | |
| Lombardstown | city | Cork | Ireland | 52.12 | -8.78 | 311 | 1337 |
| Lombard’s Cross Roads | city | Ireland | 51.98 | -7.90 | 196 | 7444 | |
| Long Island Well | city | Laois | Ireland | 52.96 | -7.49 | 337 | 2298 |
| Longfield | city | Mayo | Ireland | 53.93 | -9.14 | 104 | 1854 |
| Longford | city | Longford | Ireland | 53.73 | -7.80 | 236 | 9819 |
| Longford | city | Offaly | Ireland | 53.06 | -7.74 | 830 | 889 |
| Longford | city | Ireland | 52.39 | -8.22 | 902 | 1037 | |
| Longford | city | Laois | Ireland | 53.13 | -7.49 | 994 | 953 |
| Longford Bridge | city | Ireland | 52.56 | -8.23 | 242 | 2506 | |
| Longford Bridge | city | Ireland | 52.54 | -8.52 | 246 | 2346 | |
| Longfordas | city | Longford | Ireland | 53.73 | -7.80 | 236 | 9819 |
| Longfordpass Bridge | city | Ireland | 52.70 | -7.63 | 830 | 1602 | |
| Longfordpass North | city | Ireland | 52.71 | -7.66 | 830 | 1389 | |
| Longfordpass South | city | Ireland | 52.68 | -7.65 | 830 | 1544 | |
| Longhill Bridge | city | Kilkenny | Ireland | 52.86 | -7.30 | 830 | 1993 |
| Longstone | city | Ireland | 52.56 | -8.41 | 295 | 2240 | |
| Longueville | city | Cork | Ireland | 52.13 | -8.73 | 223 | 2924 |
| Longwood | city | Meath | Ireland | 53.45 | -6.92 | 269 | 2496 |
| Lookout | city | Wexford | Ireland | 52.34 | -6.90 | 255 | 3152 |
| Loona | city | Mayo | Ireland | 53.80 | -9.18 | 232 | 1626 |
| Looscaun | city | Galway | Ireland | 53.03 | -8.33 | 196 | 714 |
| Loputo | city | Donegal | Ireland | 54.48 | -8.13 | 239 | 2292 |
| Lordstown | city | Meath | Ireland | 53.70 | -7.06 | 396 | 992 |
| Lorg an Chlai | city | Mayo | Ireland | 54.18 | -10.08 | 3 | 692 |
| Lorragh | city | Ireland | 53.09 | -8.12 | 183 | 858 | |
| Lorrha | city | Ireland | 53.09 | -8.12 | 183 | 858 | |
| Lorum | city | Carlow | Ireland | 52.67 | -6.94 | 416 | 4807 |
| Loskeran | city | Ireland | 52.02 | -7.62 | 830 | 1353 | |
| Losset | city | Ireland | 52.64 | -8.14 | 987 | 1135 | |
| Losset | city | Donegal | Ireland | 55.03 | -7.88 | 830 | 590 |
| Lota Goldsmith | city | Offaly | Ireland | 53.29 | -7.66 | 229 | 1755 |
| Louggraigue House | city | Wexford | Ireland | 52.31 | -6.76 | 111 | 2174 |
| Lough | city | Kerry | Ireland | 52.13 | -10.26 | 49 | 2470 |
| Lough | city | Wexford | Ireland | 52.23 | -6.39 | 3 | 3915 |
| Lough | city | Kilkenny | Ireland | 52.76 | -7.62 | 830 | 1581 |
| Lough | city | Galway | Ireland | 53.38 | -9.54 | 213 | 513 |
| Lough | city | Laois | Ireland | 53.12 | -7.20 | 347 | 5533 |
| Lough Nafurnace | city | Galway | Ireland | 53.38 | -9.54 | 213 | 513 |
| Lough Nakey | city | Donegal | Ireland | 55.07 | -7.69 | 209 | 2260 |
| Lough Naminnoo | city | Mayo | Ireland | 53.83 | -9.12 | 246 | 2033 |
| Loughabor | city | Kildare | Ireland | 53.05 | -6.94 | 252 | 2076 |
| Loughaclerybeg | city | Galway | Ireland | 53.35 | -8.47 | 249 | 1310 |
| Loughaconeera | city | Galway | Ireland | 53.37 | -9.72 | 360 | 464 |
| Loughacutteen | city | Ireland | 52.34 | -7.96 | 249 | 3073 | |
| Loughamiddaun | city | Clare | Ireland | 53.04 | -8.58 | 830 | 327 |
| Loughamore | city | Galway | Ireland | 53.33 | -9.76 | 374 | 677 |
| Loughanavally | city | An Iarmhi | Ireland | 53.48 | -7.53 | 830 | 1038 |
| Loughanayally | city | An Iarmhi | Ireland | 53.48 | -7.53 | 830 | 1038 |
| Loughanbran | city | Meath | Ireland | 53.68 | -7.08 | 406 | 1161 |
| Loughanderg | city | Meath | Ireland | 53.68 | -7.05 | 370 | 1243 |
| Loughane | city | Cork | Ireland | 51.87 | -8.05 | 127 | 3198 |
| Loughane East | city | Cork | Ireland | 51.95 | -8.61 | 295 | 7603 |
| Loughanstown | city | An Iarmhi | Ireland | 53.62 | -7.03 | 341 | 1537 |
| Loughanure | city | Donegal | Ireland | 55.00 | -8.29 | 6 | 2229 |
| Loughaumerin | city | Galway | Ireland | 53.39 | -9.47 | 830 | 458 |
| Loughaunavneen | city | Galway | Ireland | 53.33 | -9.62 | 3 | 1321 |
| Loughaunbeg | city | Galway | Ireland | 53.24 | -9.40 | 3 | 645 |
| Loughauneala | city | Galway | Ireland | 53.25 | -9.63 | 3 | 1922 |
| Loughaunveeny | city | Galway | Ireland | 53.31 | -9.54 | 88 | 1943 |
| Loughbeg | city | Cork | Ireland | 51.83 | -8.32 | 0 | 20868 |
| Loughboreen | city | Kilkenny | Ireland | 52.58 | -7.16 | 232 | 2490 |
| Loughcapple Bridge | city | Ireland | 52.43 | -7.65 | 167 | 2511 | |
| Loughcurra | city | Galway | Ireland | 53.13 | -8.91 | 72 | 1381 |
| Lougher | city | Meath | Ireland | 53.67 | -6.48 | 144 | 3323 |
| Lougher | city | Kerry | Ireland | 52.18 | -9.99 | 830 | 757 |
| Lougheraherk | city | Donegal | Ireland | 54.74 | -8.64 | 1669 | 455 |
| Loughfad Hill | city | Donegal | Ireland | 54.82 | -8.41 | 6 | 903 |
| Loughglinn | city | Roscommon | Ireland | 53.82 | -8.55 | 242 | 1308 |
| Loughgur Cross | city | Ireland | 52.51 | -8.51 | 282 | 2374 | |
| Loughkeen | city | Ireland | 53.04 | -7.97 | 249 | 1099 | |
| Loughkent House | city | Ireland | 52.43 | -7.87 | 354 | 1611 | |
| Loughlass | city | Laois | Ireland | 52.96 | -7.09 | 830 | 1537 |
| Loughlinstown | city | Dun Laoghaire-Rathdown | Ireland | 53.24 | -6.13 | 49 | 100194 |
| Loughmoe | city | Ireland | 52.76 | -7.83 | 357 | 3692 | |
| Loughnageer | city | Wexford | Ireland | 52.28 | -6.79 | 45 | 2387 |
| Loughnahelly | city | Mayo | Ireland | 54.17 | -9.92 | 75 | 878 |
| Loughnavalley | city | An Iarmhi | Ireland | 53.48 | -7.53 | 830 | 1038 |
| Loughpark | city | Mayo | Ireland | 53.77 | -9.16 | 183 | 1622 |
| Loughrea | city | Galway | Ireland | 53.20 | -8.57 | 344 | 5345 |
| Loughros | city | Donegal | Ireland | 55.07 | -7.67 | 249 | 2370 |
| Loughshinny | city | Fingal | Ireland | 53.55 | -6.08 | 0 | 13542 |
| Loughstown | city | An Iarmhi | Ireland | 53.63 | -7.16 | 830 | 1464 |
| Loughtally | city | Ireland | 52.35 | -7.78 | 144 | 6143 | |
| Loughtown | city | Leitrim | Ireland | 53.97 | -7.96 | 246 | 1310 |
| Louisburgh | city | Mayo | Ireland | 53.77 | -9.82 | 36 | 734 |
| Loumanagh | city | Cork | Ireland | 52.15 | -9.10 | 830 | 1808 |
| Loumore | city | Cork | Ireland | 51.91 | -8.42 | 203 | 80419 |
| Louth | city | Lu | Ireland | 53.95 | -6.54 | 124 | 2961 |
| Lower Ballycotteen | city | Clare | Ireland | 52.97 | -9.41 | 265 | 1090 |
| Lowertown | city | Cork | Ireland | 51.52 | -9.60 | 124 | 1215 |
| Lowry's Bridge | city | Ireland | 52.29 | -7.38 | 183 | 2688 | |
| Lowry’s Bridge | city | Ireland | 52.29 | -7.38 | 183 | 2688 | |
| Lowtown | city | Roscommon | Ireland | 53.37 | -8.12 | 321 | 1461 |
| Lowtown | city | Wicklow | Ireland | 52.97 | -6.74 | 830 | 2496 |