| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Labbadiha Bridge | city | Ireland | 52.80 | -8.40 | 249 | 3008 | |
| Lackamore | city | Ireland | 52.87 | -8.33 | 830 | 1754 | |
| Lackamore | city | Ireland | 52.70 | -8.33 | 1000 | 1464 | |
| Laghile | city | Ireland | 52.69 | -8.18 | 859 | 802 | |
| Lahagh | city | Ireland | 52.81 | -7.76 | 830 | 1429 | |
| Lake Village | city | Ireland | 53.08 | -8.09 | 209 | 848 | |
| Laoileach | city | Ireland | 53.10 | -8.02 | 219 | 1105 | |
| Lelagh | city | Ireland | 53.10 | -8.02 | 219 | 1105 | |
| Lenagh | city | Ireland | 52.71 | -7.85 | 331 | 8943 | |
| Lisdonowley | city | Ireland | 52.74 | -7.75 | 413 | 1581 | |
| Lisduff | city | Ireland | 52.92 | -8.24 | 246 | 4932 | |
| Lisduff | city | Ireland | 52.70 | -7.76 | 374 | 7316 | |
| Lisgarode | city | Ireland | 52.89 | -8.13 | 331 | 3249 | |
| Lisheen Cross Roads | city | Ireland | 52.76 | -7.73 | 830 | 1373 | |
| Lissatunny | city | Ireland | 52.85 | -8.18 | 249 | 8790 | |
| Littleton | city | Ireland | 52.64 | -7.74 | 830 | 2716 | |
| 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 | |
| Lorragh | city | Ireland | 53.09 | -8.12 | 183 | 858 | |
| Lorrha | city | Ireland | 53.09 | -8.12 | 183 | 858 | |
| Loughkeen | city | Ireland | 53.04 | -7.97 | 249 | 1099 | |
| Loughmoe | city | Ireland | 52.76 | -7.83 | 357 | 3692 | |
| Luska | city | Ireland | 52.95 | -8.27 | 830 | 1001 |