The Tarzan yell is the distinctive, ululating yell of the character Tarzan, as portrayed by actor Johnny Weissmuller in the films based on the character created by Edgar Rice Burroughs, starting with Tarzan the Ape Man (1932).

Although the yell ostensibly was that of Weissmuller, different stories exist as to how the sound effect was created. According to the newspaper columnist L. M. Boyd (circa 1970), "Blended in with that voice are the growl of a dog, a trill sung by a soprano, a note played on a violin's G string and the howl of a hyena recorded backward."

But Weissmuller claimed that the yell was actually his own voice, of his own invention, based on a yell he used when playing as a child.