The quokka is a small macropod about the size of a domestic cat. It is the only member of the genus Setonix. Like other marsupials in the macropod family, the quokka is herbivorous and mainly nocturnal.

Macropodidae is a family of marsupials that includes kangaroos, wallabies, tree-kangaroos, wallaroos, pademelons, quokkas, and several other groups. These genera are allied to the suborder Macropodiformes, containing other macropods, and are native to the Australian continent, New Guinea and nearby islands.