Fahn is an English, German and Jewish surname. The name derives from the Yiddish word fayn meaning 'nice'. Notable people with the surname include:
Avraham Fahn (1916–2012), Israeli professor of botany Mike Fahn (born 1960), American jazz trombonist Melissa Fahn (born 1973), American voice/stage actress and singer Tom Fahn (born 1962), American voice actor Jonathan Fahn (born 1965), voice actor
See also Fan (disambiguation) Fah (disambiguation)