Macropus titan is an extinct species of kangaroo belonging to the genus Macropus that lived in Australia during the Pleistocene. It is one of the largest known kangaroo species, with an estimated body mass of around , exceeding living kangaroos in size. Some authors have argued that the species should be considered a paleosubspecies of the eastern grey kangaroo (Macropus giganteus) as Macropus giganteus titan.
The dental mesowear of this macropodid is indicative of it being a mixed feeder.