Formosan may refer to various things associated with the island of Taiwan (formerly called Formosa):
Taiwanese people who lived on the island before 1945, and their descendants Taiwanese indigenous peoples, descendants of inhabitants of the island before Chinese settlement Formosan languages, the languages of the indigenous people of the island Formosan black bear, a species endemic to the island Formosan Mountain Dog, a breed of dog commonly referred to as Formosan Formosan Rock Macaque, a species of macaque monkey found in Taiwan
See also Taiwanese (disambiguation) Formosa (disambiguation)