The Irish state has officially approved the following List of National Monuments in County Cavan. 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.
| NM# | Monument name | Description | Image | Townland | Location |
|---|---|---|---|---|---|
| 585 | Cabragh | Ringfort | Cabragh | ||
| 456 | Cohaw | Court Tomb | Cohaw | ||
| 4 | Drumlane | Church & Round Tower | Drumlane | ||
| 585 | Errigal | Ringfort | Errigal | ||
| 570 | Gartnanoul | Court Tomb | Gartnanoul | ||
| 602 | Cloughoughter Castle | Castle | Inishconnell | ||
| 616 | Lisnagowan | Ringfort | Lisnagowan |
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