| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| L'Estrange Bridge | city | County Offaly | Ireland | 53.2311111 | -7.9158333 | 223 | 2657 |
| Lavagh | city | County Offaly | Ireland | 53.1752778 | -8.0494444 | 183 | 2715 |
| Lea More | city | County Offaly | Ireland | 53.2416667 | -7.7216667 | 223 | 2657 |
| Leabeg | city | County Offaly | Ireland | 53.2325 | -7.7269444 | 226 | 2657 |
| Lemanaghan | city | County Offaly | Ireland | 53.2888889 | -7.7466667 | 242 | 2654 |
| Letter Cross Roads | city | County Offaly | Ireland | 53.0888889 | -7.6241667 | 1289 | 2735 |
| Limekiln | city | County Offaly | Ireland | 53.1947222 | -7.7472222 | 226 | 2660 |
| Lisduff | city | County Offaly | Ireland | 53.1472222 | -7.7666667 | 246 | 2661 |
| Longford | city | County Offaly | Ireland | 53.0613889 | -7.7444444 | 564 | 2673 |
| Lug | city | County Offaly | Ireland | 53.2111111 | -7.8608333 | 242 | 2657 |
| 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 |
| Lurgan | city | County Offaly | Ireland | 53.3733333 | -7.7066667 | 246 | 2759 |
| Lynally Glebe | city | County Offaly | Ireland | 53.2611111 | -7.5594444 | 249 | 2655 |
| LʼEstrange Bridge | city | County Offaly | Ireland | 53.2311111 | -7.9158333 | 223 | 2657 |
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