List of national monuments in County Roscommon

The Irish state has officially approved the following list of national monuments in County Roscommon. 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
559	Altore Wedge Tomb	Wedge Tomb		Altore	53°42′17″N 8°40′50″W / 53.704854°N 8.680440°W / 53.704854; -8.680440
488	Ardcarn Mound	Mound & Ringfort		Ardcarn	53°57′42″N 8°12′32″W / 53.961651°N 8.208779°W / 53.961651; -8.208779
682	Castle Naghten	Motte and Bailey		Ballycreggan	53°27′11″N 8°03′38″W / 53.453164°N 8.060492°W / 53.453164; -8.060492
362	Roscommon Abbey	Friary (Dominican)		Ballypheasan	53°37′29″N 8°11′30″W / 53.624693°N 8.191776°W / 53.624693; -8.191776
487	Carnagh West Ringfort	Ringfort		Carnagh West	53°30′48″N 8°02′39″W / 53.513346°N 8.044055°W / 53.513346; -8.044055
294	Rathcroghan	Archaeological Complex		Tulsk	53°48′07″N 8°18′14″W / 53.802°N 8.304°W / 53.802; -8.304 (Rathcroghan)
473	Rathcroghan	Archaeological Complex (field system, cashel, enclosures, court tomb etc)		Glenballythomas	53°47′34″N 8°18′18″W / 53.7927°N 8.3050°W / 53.7927; -8.3050 (Rathcroghan)
586	McDermott's Castle	Castle		Castle Island (Lough Key)	53°59′22″N 8°13′57″W / 53.98948°N 8.232625°W / 53.98948; -8.232625
320	Castlestrange stone	Sculptured Stone		Athleague	53°35′13″N 8°16′19″W / 53.5869536°N 8.2718327°W / 53.5869536; -8.2718327 (Castlestrange stone)
557	Inchmacnerin Abbey	Priory (Augustinian)		Church Island (Lough Key)	53°59′40″N 8°15′39″W / 53.994493°N 8.260788°W / 53.994493; -8.260788
181	Roscommon Castle	Castle		Roscommon	53°38′07″N 8°11′36″W / 53.63541°N 8.19326°W / 53.63541; -8.19326 (Roscommon Castle)
608	Cloonshanville High Cross	High Cross		Cloonshanville	53°52′03″N 8°23′24″W / 53.867399°N 8.38999°W / 53.867399; -8.38999
650	Drummin fort	Ringfort & Ogham Stones		Drummin	53°50′04″N 8°22′08″W / 53.834358°N 8.368769°W / 53.834358; -8.368769
397	Emlagh High Cross	High crosses: two shafts and head fragments		Emlagh	53°44′43″N 8°27′23″W / 53.745382°N 8.456292°W / 53.745382; -8.456292
167	Boyle Abbey	Abbey (Cistercian)		Knocknashee	53°58′25″N 8°17′49″W / 53.973611°N 8.296944°W / 53.973611; -8.296944 (Boyle Abbey)
556	Trinity Abbey	Abbey (Premonstratensian)		Trinity Island (Lough Key)	53°59′21″N 8°15′16″W / 53.989215°N 8.254515°W / 53.989215; -8.254515

• National Monuments in State Care: Ownership & Guardianship, County Roscommon