This list of mammals of Ohio includes a total of 70 mammal species recorded in the state of Ohio. 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.

Order: Didelphimorphia

Opossums
Family: Didelphidae

 Virginia opossum, Didelphis virginiana

Order: Eulipotyphla

Shrews

Family: Soricidae

 Northern short-tailed shrew, Blarina brevicauda
 North American least shrew, Cryptotis parva
 Masked shrew, Sorex cinereus
 Smoky shrew, Sorex fumeus
 American pygmy shrew, Sorex hoyi

Moles
Family: Talpidae

 Star-nosed mole, Condylura cristata
 Hairy-tailed mole, Parascalops breweri
 Eastern mole, Scalopus aquaticus

Order: Chiroptera

Vesper bats

Family: Vespertilionidae

 Rafinesque's big-eared bat, Corynorhinus rafinesquii
 Big brown bat, Eptesicus fuscus
 Silver-haired bat, Lasionycteris noctivagans
 Eastern red bat, Lasiurus borealis
 Hoary bat, Lasiurus cinereus
 Gray bat, Myotis grisescens 
 Eastern small-footed bat, Myotis leibii
 Little brown bat, Myotis lucifugus
 Northern long-eared bat, Myotis septentrionalis
 Indiana bat, Myotis sodalis 
 Evening bat, Nycticeius humeralis
 Tricolored bat, Perimyotis subflavus

Free-tailed bats
Family: Molossidae

 Mexican free-tailed bat, Tadarida brasiliensis

Order: Lagomorpha

Rabbits and hares
Family: Leporidae

 Snowshoe hare, Lepus americanus extirpated
 Eastern cottontail, Sylvilagus floridanus

Order: Rodentia

Squirrels

Family: Sciuridae

 Southern flying squirrel, Glaucomys volans
 Thirteen-lined ground squirrel, Ictidomys tridecemlineatus
 Groundhog, Marmota monax
 Eastern gray squirrel, Sciurus carolinensis
 Fox squirrel, Sciurus niger
 Eastern chipmunk, Tamias striatus
 American red squirrel, Tamiasciurus hudsonicus

Beavers
Family: Castoridae

 North American beaver, Castor canadensis

Jumping mice
Family: Dipodidae

 Woodland jumping mouse, Napaeozapus insignis
 Meadow jumping mouse, Zapus hudsonius

New World mice, rats, and voles

Family: Cricetidae

 Prairie vole, Microtus ochrogaster
 Meadow vole, Microtus pennsylvanicus
 Pine vole, Microtus pinetorum
 Southern red-backed vole, Myodes gapperi 
 Allegheny woodrat, Neotoma magister extirpated
 Muskrat, Ondatra zibethicus
 Marsh rice rat, Oryzomys palustris extirpated
 White-footed mouse, Peromyscus leucopus
 Eastern deer mouse, Peromyscus maniculatus
 Eastern harvest mouse, Reithrodontomys humulis
 Southern bog lemming, Synaptomys cooperi

Old World mice and rats
Family: Muridae

 House mouse, Mus musculus introduced
 Brown rat, Rattus norvegicus introduced
 Black rat, Rattus rattus introduced

New World porcupines
Family: Erethizontidae

 North American porcupine, Erethizon dorsatum vagrant

Order: Carnivora

Canids (wolves, coyotes, and foxes)

Family: Canidae

 Coyote, Canis latrans
 Eastern wolf, Canis lycaon extirpated
 Gray fox, Urocyon cinereoargenteus
 Red fox, Vulpes vulpes

Bears
Family: Ursidae

 American black bear, Ursus americanus

Raccoons
Family: Procyonidae

 Raccoon, Procyon lotor

Mustelids

Family: Mustelidae

 North American river otter, Lontra canadensis
 American marten, Martes americana extirpated
 Least weasel, Mustela nivalis
American ermine, Mustela richardsonii 
 Long-tailed weasel, Neogale frenata
 American mink, Neogale vison
 Fisher, Pekania pennanti extirpated
 American badger, Taxidea taxus

Skunks
Family: Mephitidae

 Striped skunk, Mephitis mephitis

Cats

Family: Felidae

 Bobcat, Lynx rufus
 Cougar, Puma concolor extirpated
Eastern cougar, P. c. couguar

Order: Artiodactyla

Deer
Family: Cervidae

 Elk, Cervus canadensis extirpated
Eastern elk, C. c. canadensis 
 White-tailed deer, Odocoileus virginianus

Bovids
Family: Bovidae

 American bison, Bison bison extirpated
Plains bison, B. b. bison extirpated

Pigs
Family: Suidae

 Wild boar, Sus scrofa introduced

See also
 Lists of mammals by region
 List of U.S. state mammals
 List of birds of Ohio

References

Ohio
Mammals of Ohio
Lists of fauna of Ohio