Ubykh is an extinct Northwest Caucasian language once spoken by the Ubykh people, a subgroup of Circassians who originally inhabited the eastern coast of the Black Sea before being deported en masse to the Ottoman Empire in the Circassian genocide.

Ubykh, an extinct Northwest Caucasian language, has the largest consonant inventory of all documented languages that do not use clicks, and also has the most disproportional ratio of phonemic consonants to vowels.

The Ubykh are an ethnic group of the Circassian nation, represented by one of the twelve stars on the green-and-gold Circassian flag.