Eastern gray squirrel

Eastern gray squirrel Temporal range: Late Pleistocene – present (19,000–0 YBP)
Conservation status
Least Concern (IUCN 3.1)
Secure (NatureServe)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Sciuridae
Genus:	Sciurus
Subgenus:	Sciurus
Species:	S. carolinensis
Binomial name
Sciurus carolinensis Gmelin, 1788
Subspecies
S. c. carolinensis S. c. extimus S. c. fuliginosus S. c. hypophaeus S. c. pennsylvanicus S. c. leucotis
Native range in red
Synonyms
Neosciurus carolinensis S. pennsylvanica S. hiemalis S. leucotis S. fulginosus S. migratorius
Audio
Calls recorded in Surrey, England

The eastern gray squirrel (Sciurus carolinensis), spelled as grey squirrel outside of the United States, is a species of tree squirrel in the genus Sciurus. It is native to eastern North America, where it is the most prodigious and ecologically essential natural forest regenerator. Widely introduced to certain places around the world, the eastern gray squirrel in Europe, in particular, is regarded as an invasive species.

In Europe, Sciurus carolinensis is included (since 2016) in the list of Invasive Alien Species of Union concern (the Union list). This implies that this species cannot be imported, bred, transported, commercialized, or intentionally released into the environment in the whole of the European Union.