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

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 / 53.025845; -7.205918
567	Coorlaghan Ringfort	Ringfort		Coorlaghan	52°50′14″N 7°00′39″W / 52.837357°N 7.01086°W / 52.837357; -7.01086
615	Dunamase Castle	Castle		Portlaoise and Stradbally	53°01′55″N 7°12′39″W / 53.031982°N 7.210748°W / 53.031982; -7.210748
113	St. Kieran's Church	Church & Cross		Errill	52°51′11″N 7°40′19″W / 52.852981°N 7.671985°W / 52.852981; -7.671985
114.01	Fossy Church	Church		Fossy Lower	52°57′27″N 7°11′25″W / 52.957551°N 7.190379°W / 52.957551; -7.190379
115	Killeshin Church	Church		Killeshin	52°50′51″N 7°00′05″W / 52.84738°N 7.00151°W / 52.84738; -7.00151
116	Sleaty Church	Church & Crosses		Sleaty	52°51′29″N 6°56′31″W / 52.858046°N 6.941971°W / 52.858046; -6.941971
114.02	Timahoe Church	Church & Round Tower		Timahoe	52°57′38″N 7°12′13″W / 52.960498°N 7.203569°W / 52.960498; -7.203569

Sources

• National Monuments in County Laois