| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Largydonnell | city | County Leitrim | Ireland | 54.4111111 | -8.3194444 | 324 | 1470 |
| Larkfield | city | County Leitrim | Ireland | 54.2613889 | -8.1569444 | 613 | 1380 |
| Lavaur | city | County Leitrim | Ireland | 54.0775 | -8.0252778 | 413 | 1429 |
| Lecarrow | city | County Leitrim | Ireland | 54.1447222 | -8.0991667 | 190 | 1474 |
| Leckanarainey | city | County Leitrim | Ireland | 54.3572222 | -8.2447222 | 459 | 1377 |
| Leckaun | city | County Leitrim | Ireland | 54.2772222 | -8.28 | 456 | 1380 |
| Leitrim | city | County Leitrim | Ireland | 53.9908333 | -8.0636111 | 232 | 1519 |
| Letter | city | County Leitrim | Ireland | 54.1641667 | -8.1697222 | 462 | 1785 |
| Liatroim | city | County Leitrim | Ireland | 53.9908333 | -8.0636111 | 232 | 1519 |
| Liscally | city | County Leitrim | Ireland | 54.4344444 | -8.3997222 | 3 | 1631 |
| Liscarban | city | County Leitrim | Ireland | 54.0558333 | -7.9688889 | 357 | 1387 |
| Liscoghil | city | County Leitrim | Ireland | 54.1969444 | -8.1347222 | 331 | 1394 |
| Lisconor | city | County Leitrim | Ireland | 54.0122222 | -8.0177778 | 232 | 1412 |
| Lisgorman | city | County Leitrim | Ireland | 54.2494444 | -8.2061111 | 423 | 1383 |
| Lismoyle | city | County Leitrim | Ireland | 53.9447222 | -8.05 | 229 | 1615 |
| Lisnabrack | city | County Leitrim | Ireland | 54.3277778 | -8.1955556 | 305 | 1377 |
| Lisomadaun | city | County Leitrim | Ireland | 53.9619444 | -7.8697222 | 229 | 1394 |
| Lisroughly | city | County Leitrim | Ireland | 54.0802778 | -7.7430556 | 249 | 1685 |
| Lissinagroagh | city | County Leitrim | Ireland | 54.3172222 | -8.1066667 | 698 | 1388 |
| Lissiniska | city | County Leitrim | Ireland | 54.3919444 | -8.1636111 | 577 | 1604 |
| Loughtown | city | County Leitrim | Ireland | 53.9691667 | -7.9619444 | 246 | 1404 |
| Lugmeeltan | city | County Leitrim | Ireland | 54.1852778 | -8.1916667 | 531 | 1459 |
| Lurganboy | city | County Leitrim | Ireland | 54.3147222 | -8.1963889 | 262 | 1377 |
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