This list of mammals of Ohio includes a total of 70 mammal species recorded in the state of Ohio.[1] Of these, three (the American black bear, Indiana bat, and Allegheny woodrat) are listed as endangered in the state; four (the brown rat, black rat, house mouse, and wild boar) are introduced; three (the gray bat, Mexican free-tailed bat and North American porcupine) are considered accidental; and ten (the American bison, elk, Allegheny woodrat, snowshoe hare, fisher, cougar, Canada lynx, eastern wolf, marsh rice rat and the American marten) have been extirpated from the state.
Family: Didelphidae
Family: Soricidae
Family: Talpidae
Family: Vespertilionidae
Family: Molossidae
Family: Leporidae
Family: Sciuridae
Family: Castoridae
Family: Dipodidae
Family: Cricetidae
Family: Muridae
Family: Erethizontidae
Family: Canidae
Family: Ursidae
Family: Procyonidae
Family: Mustelidae
Family: Mephitidae
Family: Felidae
Family: Bovidae
Family: Cervidae
Family: Suidae
