Bigfoot, also commonly referred to as Sasquatch, is an ape-like cryptid alleged by cryptozoologists and enthusiasts to inhabit the forests of North America. Dubious evidence has been offered to prove Bigfoot's existence, including anecdotal claims of sightings, photographs, video and audio recordings, hair samples, and casts of large footprints. Some of this evidence was later discovered to be hoaxes or misidentification, and scientists do not find any of the remaining evidence compelling.

Tales of wild, hairy humanoids exist throughout the world, and such creatures appear in the folklore of North America, including the mythologies of indigenous people. Bigfoot is an icon within the fringe pseudoscience of cryptozoology, and an enduring element of popular culture.

Scientists have historically discounted the existence of Bigfoot, considering it to be the result of a combination of folklore, misidentification, and hoax, rather than a living animal. Folklorists trace the phenomenon of Bigfoot to a combination of factors and sources including indigenous cultures, the European wild man figure, and folk tales. Wishful thinking, a cultural increase in environmental concerns, and overall societal awareness of the subject have been cited as additional factors.

Other creatures of relatively similar descriptions are alleged to inhabit various regions throughout the world, such as the Skunk ape of the southeastern United States; the Almas, Yeren, and Yeti in Asia; and the Australian Yowie; all of which are also engrained in the cultures of their regions.