The Irish state has officially approved the following list of national monuments in County Laois. 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 |
|---|---|---|---|---|---|
| 540 | Aghnahily Ringfort | Ringfort | Aghnahily | 53°01′33″N 7°12′21″W / 53.025845°N 7.205918°W | |
| 567 | Coorlaghan Ringfort | Ringfort | Coorlaghan | 52°50′14″N 7°00′39″W / 52.837357°N 7.01086°W | |
| 615 | Dunamase Castle | Castle |  | Portlaoise and Stradbally | 53°01′55″N 7°12′39″W / 53.031982°N 7.210748°W |
| 113 | St. Kieran's Church | Church & Cross | Errill | 52°51′11″N 7°40′19″W / 52.852981°N 7.671985°W | |
| 114.01 | Fossy Church | Church | Fossy Lower | 52°57′27″N 7°11′25″W / 52.957551°N 7.190379°W | |
| 115 | Killeshin Church | Church |  | Killeshin | 52°50′51″N 7°00′05″W / 52.84738°N 7.00151°W |
| 116 | Sleaty Church | Church & Crosses |  | Sleaty | 52°51′29″N 6°56′31″W / 52.858046°N 6.941971°W |
| 114.02 | Timahoe Church | Church & Round Tower |  | Timahoe | 52°57′38″N 7°12′13″W / 52.960498°N 7.203569°W |