Wonder Dog may refer to:
Wonder Dog, the pet of Wendy and Marvin, two teenage characters of Super Friends Wonder Dog, musician Harry Thumann's side project, best known for the 1982 single "Ruff Mix" Wonder Dog (video game), a video game for the Mega-CD and Amiga Wonder Dog (Disney short), a 1950 short animation by the Walt Disney Company Rex the Wonder Dog, a fictional dog in the DC Comics universe