The Irish state has officially approved the following list of national monuments in County Leitrim. In the Republic of Ireland, a structure or site may be deemed to be a "national monument", and therefore worthy of state protection, if it is of national importance. If the land adjoining the monument is essential to protect it, this land may also be protected.
National Monuments
edit| NM# | Monument name | Description | Image | Townland | Location |
|---|---|---|---|---|---|
| 477 | Aghaderrard Court Tomb | Court Tomb | Aghaderrard West | 54°26′06″N 8°14′20″W / 54.43489°N 8.23893°W | |
| 68 | Fenagh Churches | Churches |  | Fenagh | 54°01′05″N 7°50′06″W / 54.018027°N 7.834934°W |
| 405 | Corracloona Court Tomb | Megalithic Tomb |  | Corracloona | 54°20′05″N 8°00′16″W / 54.334821°N 8.004539°W |
| 69 | Creevelea Abbey | Friary (Franciscan) | | Creevelea | 54°13′53″N 8°18′35″W / 54.231291°N 8.309791°W |
| 390 | Parke's Castle | Castle |  | Dromahair | 54°15′53″N 8°20′04″W / 54.264768°N 8.334429°W |
| 508 | Seán Mac Diarmada's House | House with historical associations |  | Kiltyclogher | |
| 653 | Worm Ditch (Black Pig's Dyke) | Linear Earthwork | Lattone, Gortnaderrary | 54°22′45″N 8°04′12″W / 54.379178°N 8.069929°W |