The Irish state has officially approved the following list of national monuments in County Mayo. 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
103	Moyne Abbey	Friary (Franciscan)		Abbeylands	54°12′08″N 9°10′37″W / 54.202234°N 9.177070°W / 54.202234; -9.177070 (Moyne Abbey)
96	Aghagower Round Tower	Round Tower & Church		Aghagower	53°45′51″N 9°27′54″W / 53.764136°N 9.46491°W / 53.764136; -9.46491 (Aghagower Round Tower)
243	Aghalard Castle	Castle		Aghalahard	53°33′22″N 9°17′56″W / 53.556042°N 9.298899°W / 53.556042; -9.298899 (Aghalard Castle)
403	Balla Round Tower	Round Tower		Balla	53°48′18″N 9°07′53″W / 53.805042°N 9.131478°W / 53.805042; -9.131478 (Balla Round Tower)
145	Ballina Portal Tomb (Dolmen of the Four Maols)	Portal Tomb[citation needed]		Ballina	54°06′25″N 9°09′57″W / 54.107036°N 9.165794°W / 54.107036; -9.165794 (Ballina Portal Tomb)
501	Ballintubber Abbey	Priory (Augustinian)		Ballintubber	53°45′23″N 9°16′58″W / 53.756382°N 9.282874°W / 53.756382; -9.282874 (Ballintubber Abbey)
325	Ballylahan Castle	Castle		Ballylahan	53°56′05″N 9°06′18″W / 53.9346°N 9.105°W / 53.9346; -9.105 (Ballylahan Castle)
251	Ballymacgibbon Cairn	Cairn		Ballymacgibbon North	53°32′32″N 9°14′14″W / 53.542213°N 9.237102°W / 53.542213; -9.237102 (Ballymacgibbon Cairn)
561	Barnacahoge Cashel	Cashel		Barnacahoge	53°54′20″N 8°51′23″W / 53.905452°N 8.856397°W / 53.905452; -8.856397 (Barnacahoge Cashel)
530	Boheh Stone	Rock Art		Boheh	53°44′51″N 9°33′14″W / 53.747497°N 9.553945°W / 53.747497; -9.553945 (Boheh Stone)
415	Breastagh Ogham Stone	Ogham Stone		Breastagh	54°14′47″N 9°15′12″W / 54.246420°N 9.253433°W / 54.246420; -9.253433 (Breastagh Ogham Stone)
244	Caherduff Castle	Castle		Caherduff	53°33′08″N 9°14′41″W / 53.552185°N 9.244741°W / 53.552185; -9.244741 (Caherduff Castle)
631	Carbad More	Ringfort		Carbad More	54°14′10″N 9°15′27″W / 54.236138°N 9.257463°W / 54.236138; -9.257463 (Carbad More)
246	Eochy's Cairn	Cairn		Carn (Ballinchalla)	53°35′19″N 9°15′48″W / 53.588504°N 9.263412°W / 53.588504; -9.263412 (Eochy's Cairn)
458	Carrickkildavnet Castle	Castle		Carrickkildavnet	53°52′51″N 9°56′46″W / 53.88089°N 9.94607°W / 53.88089; -9.94607 (Carrickkildavnet Castle)
293	Carrowcastle Wedge Tomb	Wedge Tomb		Carrowcastle	54°05′41″N 9°04′45″W / 54.094811°N 9.079115°W / 54.094811; -9.079115 (Carrowcastle Wedge Tomb)
293	Carrowcrom Wedge Tomb	Megalithic Tomb		Carrowcrom	54°05′24″N 9°02′52″W / 54.089964°N 9.047911°W / 54.089964; -9.047911 (Carrowcrom Wedge Tomb)
196	Murrisk Abbey	Friary (Augustinian)		Murrisk	53°46′55″N 9°38′22″W / 53.781948°N 9.639548°W / 53.781948; -9.639548 (Murrisk Abbey)
235	Burrishoole Abbey	Friary (Dominican)		Newport	53°53′56″N 9°34′21″W / 53.898801°N 9.572522°W / 53.898801; -9.572522 (Burrishoole Abbey)
483	Cashel Cairn	Cairn / court tomb		Cashel (Kilcummin)	54°15′20″N 9°13′36″W / 54.255493°N 9.226556°W / 54.255493; -9.226556 (Cashel Cairn)
222A	Burriscarra Abbey	Friary (Carmelite) & Church		Castlecarra	53°43′52″N 9°14′45″W / 53.731016°N 9.245722°W / 53.731016; -9.245722 (Burriscarra Abbey)
222B	Castle Carra	Castle		Castlecarra	53°43′17″N 9°15′19″W / 53.721465°N 9.255320°W / 53.721465; -9.255320 (Castle Carra)
432	Cong Abbey	Priory (Augustinian)		Cong	53°32′25″N 9°17′12″W / 53.540255°N 9.286659°W / 53.540255; -9.286659 (Cong Abbey)
308	Templenagalliaghdoo	Church		Errew (Tirawley)	54°03′16″N 9°15′49″W / 54.054387°N 9.263631°W / 54.054387; -9.263631 (Templenagalliaghdoo)
307	Errew Abbey	Priory (Augustinian)		Errew (Tirawley)	54°03′11″N 9°15′48″W / 54.053148°N 9.263353°W / 54.053148; -9.263353 (Errew Abbey)
99A	St. Dairbhile's Church	Church		Fallmore	54°05′46″N 10°06′25″W / 54.096198°N 10.106976°W / 54.096198; -10.106976 (St. Dairbhile's Church)
146	Glebe Stone Circles	Stone Circles		Glebe (Cong), Nymphstown, Tonaleeaun	53°32′52″N 9°15′54″W / 53.5477°N 9.2649°W / 53.5477; -9.2649 (Glebe Stone Circles)
198	Granuaile's Castle	Castle		Glen (Clare Island)	53°47′59″N 9°57′05″W / 53.799753°N 9.951312°W / 53.799753; -9.951312 (Granuaile's Castle)
99	Inishglora	Early Medieval Ecclesiastical Site		Inishglora Island	54°12′31″N 10°07′13″W / 54.208483°N 10.120228°W / 54.208483; -10.120228 (Inishglora)
379	Inishkea North Island	Early Medieval Ecclesiastical Sites		Inishkea Islands	54°08′00″N 10°11′16″W / 54.133337°N 10.187876°W / 54.133337; -10.187876 (Inishkea North Island)
102	Inishmaine Abbey	Priory (Augustinian)		Inishmaine	53°35′53″N 9°18′05″W / 53.598077°N 9.301387°W / 53.598077; -9.301387 (Inishmaine Abbey)
619	Kilcashel Stone Fort	Cashel		Kilcashel	53°53′00″N 8°40′49″W / 53.883436°N 8.680195°W / 53.883436; -8.680195 (Kilcashel Stone Fort)
402	Kildermot Church (Killdermot Abbey)	Church		Kildermot	54°03′30″N 9°05′25″W / 54.058304°N 9.090279°W / 54.058304; -9.090279 (Kildermot Church)
423	Kildun Standing Stones	Standing Stones		Kildun	53°59′20″N 9°50′24″W / 53.988777°N 9.840015°W / 53.988777; -9.840015 (Kildun Standing Stones)
95A	Kinlough Castle	Castle and church		Kinlough	53°29′55″N 9°06′59″W / 53.498557°N 9.116494°W / 53.498557; -9.116494 (Kinlough Castle)
296	Lankill Standing Stone	Standing Stone		Lankill	53°45′12″N 9°30′06″W / 53.753238°N 9.501742°W / 53.753238; -9.501742 (Lankill Standing Stone)
98	Meelick Round Tower	Round Tower		Meelick	53°55′17″N 9°01′12″W / 53.921502°N 9.020115°W / 53.921502; -9.020115 (Meelick Round Tower)
359	The Gods of the Neale Monument	Monument		Neale Park	53°34′26″N 9°13′28″W / 53.57395757°N 9.22446767°W / 53.57395757; -9.22446767 (The Gods of the Neale Monument)
413	Kelly's Cave	Cave		Nymphsfield	53°32′40″N 9°16′45″W / 53.544443°N 9.279192°W / 53.544443; -9.279192 (Kelly's Cave)
664	Bunnadober Mill	Mill Complex		Rahard (Ballinrobe)	53°36′27″N 9°16′04″W / 53.607455°N 9.267683°W / 53.607455; -9.267683 (Bunnadober Mill)
269	Rathfran Friary	Friary (Dominican)		Rathfran	54°14′17″N 9°14′40″W / 54.238015°N 9.244375°W / 54.238015; -9.244375 (Rathfran Friary)
389	Rathfran Stone Circle	Stone circle, mound, ringfort, souterrain & enclosure		Rathfran	54°14′38″N 9°14′24″W / 54.243797°N 9.240098°W / 54.243797; -9.240098 (Rathfran Stone Circle)
633	Rathfranpark Wedge Tomb	Wedge Tomb		Rathfranpark	54°14′31″N 9°15′09″W / 54.241994°N 9.252605°W / 54.241994; -9.252605 (Rathfranpark Wedge Tomb)
454	Rockfleet Castle	Castle		Newport	53°53′46″N 9°37′37″W / 53.89600°N 9.62704°W / 53.89600; -9.62704 (Rockfleet Castle)
386	Rosdoagh Court Tomb	court tomb		Rosdoagh	54°16′48″N 9°48′05″W / 54.280107°N 9.801402°W / 54.280107; -9.801402 (Rosdoagh Court Tomb)
104	Rosserk Abbey	Friary (Franciscan)		Rosserk	54°10′17″N 9°08′36″W / 54.171418°N 9.143457°W / 54.171418; -9.143457 (Rosserk Abbey)
95	Shrule Abbey	Church		Shrule	53°31′08″N 9°05′27″W / 53.518869°N 9.090717°W / 53.518869; -9.090717 (Shrule Abbey)
172	Strade Abbey	Friary (Dominican)		Strade	53°55′17″N 9°07′44″W / 53.921527°N 9.128871°W / 53.921527; -9.128871 (Strade Abbey)
97	Clare Island Abbey	Church (Cistercian)		Lecarrow (Clare Island)	53°47′36″N 9°59′21″W / 53.793229°N 9.989088°W / 53.793229; -9.989088 (Clare Island Abbey)
105	Killala Round Tower	Round Tower		Killala	54°12′47″N 9°13′15″W / 54.213066°N 9.220819°W / 54.213066; -9.220819 (Killala Round Tower)
100	Turlough Church	Church & Round Tower		Turlough	53°53′19″N 9°12′30″W / 53.888713°N 9.20843°W / 53.888713; -9.20843 (Turlough Church)

• National Monuments in County Mayo