Version 2014.2 of the IUCN Red List of Threatened Species identified 4574 critically endangered species, subspecies, 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.