This list of mammals in Pennsylvania consists of 66 species currently believed to occur wild in the state. This excludes feral domesticated species.
Several species recently lived wild in Pennsylvania, but are now extirpated (locally, but not globally, extinct). They are the marsh rice rat (Oryzomys palustris), eastern wolf (Canis lycaon), American marten (Martes americana), wolverine (Gulo gulo), cougar (Puma concolor), Canada lynx (Lynx canadensis), moose (Alces alces), and bison (Bison bison).
Order: Didelphimorphia
Family: Didelphidae
One species of opossum occurs in Pennsylvania.
| Common name ! Scientific name | Status[1] ! Notes | Distribution | - | Virginia opossum | Didelphis virginiana | Common | D. virginiana virginiana | Statewide |
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Order: Eulipotyphla
Family: Soricidae
Seven species of shrews live in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Blarina brevicauda | Common | Statewide | - | Cryptotis parva | Endangered locally | South central | - | Sorex cinereus | Common | Statewide | - | Sorex cinereus fontinalis | Common | The Maryland shrew is now considered a subspecies of masked shrew. | - | Sorex dispar | Rare | - | Sorex fumeus | Common | Statewide | - | Sorex hoyi | Uncommon | Presumed statewide | - | Sorex palustris | Uncommon | Mountain streams |
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Family: Talpidae
Three species of moles occur in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Condylura cristata | Uncommon | Statewide | - | Parascalops breweri | Uncommon | Statewide | - | Scalopus aquaticus | Uncommon |
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Order: Chiroptera
Family: Vespertilionidae
Eleven species of evening bats occur in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Perimyotis subflavus | Uncommon | Statewide | - | Eptesicus fuscus | Common | Statewide | - | Nycticeius humeralis | Rare | Southeastern | - | Lasiurus borealis | Uncommon | Statewide | - | Lasiurus seminolus | Rare | Piedmont | - | Lasiurus cinereus | Uncommon | Statewide | - | Myotis leibii | Threatened locally | Statewide | - | Myotis septentrionalis | Statewide | - | Myotis lucifugus | Common | Statewide | - | Myotis sodalis | Endangered | Central | - | Lasionycteris noctivagans | Uncommon | Statewide |
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Order: Lagomorpha
Family: Leporidae
Three species of rabbits and hares occur in Pennsylvania.
| Common name ! Scientific name | Status ! Notes | Distribution | - | Eastern cottontail | Sylvilagus floridanus | Common | Statewide | - | Sylvilagus obscurus | Uncommon | Eastern mountains | - | Lepus americanus | Rare | Appalachian Uplands | |||||
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| European hare | Lepus europaeus | Common | Introduced | Northeastern area |
Order: Rodentia
Family: Castoridae
One species of beaver occurs in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Castor canadensis | Reintroduced | Statewide |
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Family: Myocastoridae
One species of porcupine occurs in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Erethizon doratum | Uncommon | Northern and central |
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Family: Dipodidae
Two species of jumping mice occur in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Napaeozapus insignis | Common | Northern and western | - | Zapus hudsonius | Common | Statewide |
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Family: Cricetidae
Nine species of voles and New World rats and mice occur in Pennsylvania.
Subfamily Arvicolinae (lemmings, voles, and muskrats)
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Microtus chrotorrhinus | Rare | Northeast | - | Microtus pennsylvanicus | Common | Statewide | - | Microtus pinetorum | Common | Statewide | - | Synaptomys cooperi | Uncommon | Statewide | - | Myodes gapperi | Common | Statewide | - | Ondatra zibethicus | Common | Statewide |
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Subfamily Neotominae (North American rats and mice)
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Neotoma magister | Threatened | Mountain ridges | - | Peromyscus maniculatus | Common | Statewide | - | Peromyscus leucopus | Common | Statewide |
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Family: Muridae
Three species of Old World rats and mice occur in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Mus musculus | Introduced | Statewide | - | Rattus norvegicus | Introduced | Statewide | - | Rattus rattus | Introduced | Statewide |
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Family: Sciuridae
Eight species of squirrels, chipmunks, and marmots occur in Pennsylvania.
Subfamily Sciurinae (tree squirrels and flying squirrels)
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Eastern gray squirrel | Sciurus carolinensis | Common | Statewide | - | Sciurus niger | Uncommon | Southern and western | - | Tamiasciurus hudsonicus | Common | Statewide | - | Glaucomys sabrinus | Rare | Northern | - | Glaucomys volans | Common | Statewide |
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Subfamily Xerinae (chipmunks and ground squirrels)
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Marmota monax | Common | Statewide | - | Ictidomys tridecemlineatus | Introduced | Mercer and Venango Counties | - | Tamias striatus | Common | Statewide |
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Order: Carnivora
Family: Felidae
One species of cat occurs in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Lynx rufus | Rare | L. rufus rufus |
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Family: Canidae
Three species of canids occur in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Canis latrans | Common | Eastern coyote, C. latrans ssp. | Statewide | - | Urocyon cinereoargenteus | Common | Statewide | - | Vulpes vulpes | Common | Eastern American red fox, V. vulpes fulvus | Statewide |
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Family: Ursidae
One species of bear occurs in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Ursus americanus | Common | U. americanus americanus | Appalachian Mountains in Central Pennsylvania |
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Family: Mephitidae
Two species of skunks occur in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Mephitis mephitis | Common | Statewide | - | Spilogale putorius | Rare | South central |
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Family: Mustelidae
Seven species of mustelids occur in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Lontra canadensis | Rare | L. canadensis canadensis | Northern | - | Mustela nivalis | Uncommon | M. nivalis allegheniensis | Western two-thirds | ||
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| American ermine | Mustela richardsonii | Uncommon | Statewide except southwest | |||||||||||
| Neogale frenata | Common | Statewide | - | Neogale vison | Common | N. vison mink | Statewide | |||||||
| Pekania pennanti | Reintroduced | North central | ||||||||||||
| Badger | Taxidea taxus | Uncommon [2] | Western two-thirds |
Family: Procyonidae
One species of raccoons occurs in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Procyon lotor | Common | Eastern raccoon, P. lotor lotor | Statewide |
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Order: Artiodactyla
Family: Cervidae
Two species of deer occur in Pennsylvania.
| - ! Common name | Scientific name ! Status | Notes ! Distribution | - | Cervus canadensis | Reintroduced | Eastern elk once inhabited the state, but were driven to extinction. Rocky Mountain elk were introduced in their place in the early 20th century, and the population has risen steadily since then. | North central | - | White-tailed deer | Odocoileus virginianus | Common | Northern white-tailed deer, O. virginianus borealis | Statewide |
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