Both are legendary ape-like figures, separated by region. Sasquatch — also called Bigfoot — belongs to the folklore of the Pacific Northwest of North America. The yeti belongs to Himalayan tradition, particularly Nepal and Tibet. Neither has any accepted physical evidence behind it.
The core difference
Two regional traditions, often blurred together in popular use.
- sasquatch / Bigfoot — Pacific Northwest; described as tall, hairy and forest-dwelling.
- yeti — Himalayan; associated with high altitude and snow.
The names
Sasquatch is an anglicisation of sásq'ets from Halkomelem, a Salishan language of the region. Yeti comes from Tibetan. "Abominable Snowman" is a 1921 journalistic rendering of a Tibetan term — a mistranslation that stuck because it made a better headline.
Related figures
Similar traditions exist widely: the yowie in Australia, the almas in Central Asia. Folklorists study them as cultural narratives; cryptozoology is the name for the attempt to treat them as undiscovered species, and it is not a recognised science.