List of mammals living in the country of Ireland ( North Atlantic ).
Of the 57 species listed in the table, 4 are endangered, 1 is vulnerable, 3 is in close proximity to a threatening state. The following tags are used to highlight the conservation status of each species according to IUCN estimates:
| EX | Extinct | Extinct |
| CR | Critically endangered | Critically Endangered |
| EN | Endangered | At risk |
| Vu | Vulnerable | Vulnerable |
| NT | Near threatened | Close to threatening state |
| LC | Least concern | Minimal threat |
| DD | Data deficient | Insufficient information |
| NE | Not valued | Unexplored Species |
List
| Title | Latin name | Taxon Author | IUCN Status | Picture |
| Squad: Carnivora | ||||
| Family: Canidae | ||||
| Wolf | Canis lupus | Linnaeus, 1758 | LC | |
| Common fox | Vulpes vulpes | Linnaeus, 1758 | LC | |
| Family: Mustelidae | ||||
| Otter | Lutra lutra | Linnaeus, 1758 | NT | |
| Pine marten | Martes martes | Linnaeus, 1758 | LC | |
| Badger | Meles meles | Linnaeus, 1758 | LC | |
| Ermine | Mustela erminea | Linnaeus, 1758 | LC | |
| Family: Phocidae | ||||
| Long-mouthed seal | Halichoerus grypus | Fabricius, 1791 | LC | |
| Harbor seal | Phoca vitulina | Linnaeus, 1758 | LC | |
| Order: Cetartiodactyla | ||||
| Family: Balaenidae | ||||
| Northern smooth whale | Eubalaena glacialis | PLS Müller, 1776 | EN | |
| Family: Balaenopteridae | ||||
| Minke whale | Balaenoptera acutorostrata | Lacépède, 1804 | LC | |
| Sail | Balaenoptera borealis | Lesson, 1828 | EN | |
| Blue whale | Balaenoptera musculus | Linnaeus, 1758 | EN | |
| Finwal | Balaenoptera physalus | Linnaeus, 1758 | EN | |
| Humpback whale | Megaptera novaeangliae | Borowski, 1781 | LC | |
| Family: Cervidae | ||||
| Noble deer | Cervus elaphus | Linnaeus, 1758 | LC | |
| Dappled deer | Cervus nippon | Temminck, 1838 | LC | |
| Doe | Dama dama | Linnaeus, 1758 | LC | |
| Family: Delphinidae | ||||
| Dolphin Squirrel | Delphinus delphis | Linnaeus, 1758 | LC | |
| Common grind | Globicephala melas | Traill, 1809 | DD | |
| Gray dolphin | Grampus griseus | G. Cuvier, 1812 | LC | |
| Atlantic white-sided dolphin | Lagenorhynchus acutus | Gray, 1828 | LC | |
| White-headed dolphin | Lagenorhynchus albirostris | Gray, 1846 | LC | |
| Killer whale | Orcinus orca | Linnaeus, 1758 | DD | |
| Killer whale | Pseudorca crassidens | Owen 1846 | DD | |
| Striped dolphin | Stenella coeruleoalba | Meyen, 1833 | LC | |
| Bottlenose dolphin | Tursiops truncatus | Montagu 1821 | LC | |
| Family: Phocoenidae | ||||
| Harbour porpoise | Phocoena phocoena | Linnaeus, 1758 | LC | |
| Family: Physeteridae | ||||
| Dwarf sperm whale | Kogia breviceps | Blainville, 1838 | DD | |
| Sperm whale | Physeter macrocephalus | Linnaeus, 1758 | Vu | |
| Family: Suidae | ||||
| Boar | Sus scrofa | Linnaeus, 1758 | LC | |
| Family: Ziphiidae | ||||
| Tall bottlenose | Hyperoodon ampullatus | Forster, 1770 | DD | |
| Atlantic noth | Mesoplodon bidens | Sowerby, 1804 | DD | |
| Antillean Vest | Mesoplodon europaeus | Gervais, 1855 | DD | |
| Timing Tooth Tru | Mesoplodon mirus | True, 1913 | DD | |
| Beak | Ziphius cavirostris | Cuvier 1823 | LC | |
| Order: Chiroptera | ||||
| Family: Rhinolophidae | ||||
| Small horseshoe | Rhinolophus hipposideros | Bechstein, 1800 | LC | |
| Family: Vespertilionidae | ||||
| European shiroshushka | Barbastella barbastellus | Schreber, 1774 | NT | |
| Watery night | Myotis daubentonii | Kuhl, 1817 | LC | |
| Mustached Night | Myotis mystacinus | Kuhl, 1817 | LC | |
| Nightlight Nutterera | Myotis nattereri | Kuhl, 1817 | LC | |
| Little party | Nyctalus leisleri | Kuhl, 1817 | LC | |
| Forest bat | Pipistrellus nathusii | Keyserling & Blasius, 1839 | LC | |
| Bat dwarf | Pipistrellus pipistrellus | Schreber, 1774 | LC | |
| Lesser Bat | Pipistrellus pygmaeus | Leach, 1825 | LC | |
| Brown ear-flaps | Plecotus auritus | Linnaeus, 1758 | LC | |
| Order: Eulipotyphla | ||||
| Family: Erinaceidae | ||||
| Common hedgehog | Erinaceus europaeus | Linnaeus, 1758 | LC | |
| Family: Soricidae | ||||
| Common shrew | Crocidura russula | Hermann, 1780 | LC | |
| Small shrew | Sorex minutus | Linnaeus, 1766 | LC | |
| Order: Lagomorpha | ||||
| Family: Leporidae | ||||
| Hare | Lepus europaeus | Pallas, 1778 | LC | |
| Hare | Lepus timidus | Linnaeus, 1758 | LC | |
| Wild rabbit | Ryctolagus cuniculus | Linnaeus, 1758 | NT | |
| Squad: Rodentia | ||||
| Family: Cricetidae | ||||
| Red vole | Myodes glareolus | Schreber, 1780 | LC | |
| Family: Muridae | ||||
| European mouse | Apodemus sylvaticus | Linnaeus, 1758 | LC | |
| House mouse | Mus musculus | Linnaeus, 1758 | LC | |
| Gray rat | Rattus norvegicus | Berkenhout, 1769 | LC | |
| Black rat | Rattus rattus | Linnaeus, 1758 | LC | |
| Family: Sciuridae | ||||
| Common squirrel | Sciurus vulgaris | Linnaeus, 1758 | LC | |