Version 2014.2 of the IUCN Red List of Threatened Species identified 4574 Critically Endangered species, subspecies and varieties, stocks and subpopulations.

For IUCN lists of critically endangered species by kingdom, see:

• Animals (kingdom Animalia) — IUCN Red List Critically Endangered species (Animalia)
  • Amphibians — List of critically endangered amphibians
  • Birds — List of critically endangered birds
  • Fish — List of critically endangered fishes
  • Invertebrates — List of critically endangered invertebrates
    • Arthropods — List of critically endangered arthropods
      • Insects — List of critically endangered insects
    • Molluscs List of critically endangered molluscs
  • Mammals — List of critically endangered mammals
  • Reptiles — List of critically endangered reptiles
• Fungi (kingdom Fungi) — List of fungi by conservation status
• Plants (kingdom Plantae) — List of critically endangered plants
• Protists (kingdom Protista) — List of Chromista by conservation status

• Category:IUCN Red List critically endangered species
• Lists of IUCN Red List endangered species
• Lists of IUCN Red List vulnerable species
• Lists of IUCN Red List near threatened species

• IUCN 2014. IUCN Red List of Threatened Species. Version 2014.2. Source of the above list: online IUCN Red List. Retrieved 30 August 2014.

This article includes an IUCN-related list of lists.