Bay Ganyo (Bulgarian: Бай Ганьо, pronounced [ˈbaj ˈɡanʲo]; also transliterated as Bai Ganio or Baj Ganjo) is a fictional character created by Bulgarian author Aleko Konstantinov (1863–1897). He is at present considered an exemplary image of an anti-hero: uneducated, ignorant, egoistic. Sometimes perceived as a stereotype of the uneducated, profit-driven Bulgarian and indeed the average Balkan person, he is often seen merely as a social stereotype, a member of the Principality of Bulgaria's newly formed lower middle-class.
The archetype of the fictional character was inspired by Ganyo Somov, a rose trader from Enina (a village in the Kazanlak municipality). At the international fair in Chicago in 1893, Aleko Konstantinov met Ganyo Somov and used him to create one of the most famous Bulgarian literature characters.
Bay is a Bulgarian honorary title to refer to older or more influential persons: the character's first name is Ganyo, and his family name has been attested as either Ganyo Somov or Ganyo Balkanski. Bay Ganyo is the protagonist of a novel-like series of satirical feuilletons by Aleko Konstantinov. The first part of the series tells of Bay Ganyo's journeys to various European cities and compares the character's culture to that of their residents. The second part satirizes the political problems of the day of the post-Liberation Bulgarian society in the late 19th century.
The character has been a subject of films picturing his adventures in Bulgaria and Western Europe which were largely based on the original literary work of Aleko Konstantinov. Konstantinov was inspired to create Bay Ganyo during a visit to Chicago's World's Columbian Exposition in 1893. Debuting in the cinemas in a silent short of 1922, Bay Ganyo was the subject of a full-length feature film by Ivan Nichev in 1991; the character was played by Georgi Kaloyanchev.