List of national monuments in County Louth

The Irish state has officially approved the following list of national monuments in County Louth. 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
326	Aghnaskeagh Cairns	Two Cairns		Aghnaskeagh	54°03′39″N 6°21′28″W / 54.060871°N 6.357804°W / 54.060871; -6.357804
LH018-040	Athclare Castle	Castle		Athclare	53°29′08″N 6°14′07″W / 53.4855°N 6.2353°W / 53.4855; -6.2353
480	Mansfieldstown Church	Church		Bawn	53°53′49″N 6°26′45″W / 53.896898°N 6.445724°W / 53.896898; -6.445724
249	Carlingford Castle	Castle		Carlingford	54°02′36″N 6°11′13″W / 54.043207°N 6.186884°W / 54.043207; -6.186884
242	The Mint	Urban Tower House		Carlingford	54°02′24″N 6°11′11″W / 54.040052°N 6.186259°W / 54.040052; -6.186259
388	Dun Dealgan	Motte		Castletown	54°00′50″N 6°25′49″W / 54.013836°N 6.430278°W / 54.013836; -6.430278
526	Donaghmore Souterrain	Souterrain		Donaghmore	54°00′11″N 6°27′36″W / 54.003072°N 6.460048°W / 54.003072; -6.460048
511	St. Laurence's Gate	Town Gate		Drogheda	53°46′31″N 7°30′01″W / 53.775218°N 7.500249°W / 53.775218; -7.500249
92	Dromiskin	Church & Round Tower		Dromiskin	53°55′20″N 6°23′54″W / 53.922124°N 6.398255°W / 53.922124; -6.398255
144	Greenmount motte	Motte		Greenmount	53°52′41″N 6°23′08″W / 53.8781°N 6.3856°W / 53.8781; -6.3856
623	Carlingford Abbey	Friary (Dominican)		Carlingford	54°02′17″N 6°11′04″W / 54.038139°N 6.18451°W / 54.038139; -6.18451
579	Lisnaran Fort	Ringfort		Linns	53°52′58″N 6°20′49″W / 53.882811°N 6.347015°W / 53.882811; -6.347015
93	Mellifont Abbey	Abbey (Cistercian)		Drogheda	53°44′33″N 6°27′59″W / 53.74241°N 6.466337°W / 53.74241; -6.466337
94	Monasterboice	High crosses, churches & round tower		Monasterboice	53°46′39″N 6°25′05″W / 53.777518°N 6.41809°W / 53.777518; -6.41809
312	St. Mochta's House	Church		Priorstate	53°57′12″N 6°32′44″W / 53.953335°N 6.545541°W / 53.953335; -6.545541
476	Proleek Dolmen	Portal Tomb & wedge Tomb		Proleek	54°02′14″N 6°20′54″W / 54.037177°N 6.348344°W / 54.037177; -6.348344
474	Clochafarmore	Standing Stone		Rathiddy	53°58′28″N 6°27′57″W / 53.974507°N 6.465904°W / 53.974507; -6.465904
597	Ravensdale Park	Cairn		Ravensdale Park	54°04′45″N 6°19′18″W / 54.079257°N 6.321654°W / 54.079257; -6.321654
460	Castleroche Castle	Castle		Dundalk	54°02′47″N 6°29′18″W / 54.046478°N 6.488439°W / 54.046478; -6.488439
562	Rockmarshall Court Tomb	Court Tomb		Annaloughan	54°00′33″N 6°17′05″W / 54.009167°N 6.284722°W / 54.009167; -6.284722
298	Roodstown Castle	Castle		Roodstown	53°52′21″N 6°29′12″W / 53.872416°N 6.486669°W / 53.872416; -6.486669
178	Termonfeckin Castle	Castle		Termonfeckin	53°45′43″N 6°16′01″W / 53.76190°N 6.26697°W / 53.76190; -6.26697
529	Townleyhall passage grave	Passage Tomb		Townleyhall	53°43′16″N 6°27′05″W / 53.721150°N 6.451253°W / 53.721150; -6.451253

• National Monuments in County Louth