Australidelphia is the magnorder that contains roughly three-quarters of all marsupials, including all those native to Australasia and a single species from South America. (All other American marsupials are members of the Ameridelphia.) The orders within this group are listed below:

• Order Microbiotheria (1 species)
  • Family Microbiotheriidae: Monito del Monte
• Order Dasyuromorphia (63 species)
  • Family Thylacinidae: Thylacine extinct
  • Family Dasyuridae: antechinuses, quolls, dunnarts, Tasmanian Devil, and allies
  • Family Myrmecobiidae: Numbat
• Order Peramelemorphia (21 species)
  • Family Peroryctidae rainforest bandicoots
  • Family Peramelidae: bandicoots and bilbies
• Order Notoryctemorphia (2 species)
  • Family Notoryctidae: marsupial moles
• Order Diprotodontia (117 species)
  • Family Phascolarctidae: Koala
  • Family Vombatidae: wombats
  • Family Phalangeridae: brushtail possums and cuscuses
  • Family Burramyidae: pygmy possums
  • Family Tarsipedidae: Honey Possum
  • Family Petauridae: Striped Possum, Leadbeater's Possum, Yellow-bellied Glider, Sugar Glider, Mahogany Glider, Squirrel Glider
  • Family Pseudocheiridae: ringtailed possums and allies
  • Family Potoridae: potoroos, rat kangaroos, bettongs
  • Family Acrobatidae: Feathertail Glider
  • Family Hypsiprymnodontidae : Musky Rat Kangaroo
  • Family Macropodidae: kangaroos, wallabies, and allies