As of June 2026, the International Union for Conservation of Nature (IUCN) lists 432 critically endangered reptile species, including 50 which are tagged as possibly extinct. 4.2% of all evaluated reptile species are listed as critically endangered; 15 subspecies, and 11 subpopulations are also listed as critically endangered.
Additionally, 1,502 reptile species (14.5% of those evaluated) are listed as data deficient, meaning there is not sufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN. While the category of data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed".
This is a complete list of critically endangered reptile species and subspecies evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such. Species and subspecies which have critically endangered subpopulations (or stocks) are indicated.
Turtles and tortoises
Chelidae
Pelomedusidae
Seychelles yellow-bellied mud turtle (Pelusios castanoides ssp. intergularis) Seychelles black mud turtle (Pelusios subniger ssp. parietalis)
Podocnemididae
Madagascar big-headed turtle (Erymnochelys madagascariensis) Magdalena River turtle (Podocnemis lewyana)
Trionychidae
Emydidae
Bog turtle (Glyptemys muhlenbergii)
Platysternidae
Big-headed turtle (Platysternon megacephalum)
Geoemydidae
Testudinidae
Cheloniidae
Dermochelyidae
Leatherback sea turtle (Dermochelys coriacea) (VU) East Pacific Ocean subpopulation Southwest Atlantic Ocean subpopulation Southwest Indian Ocean subpopulation West Pacific Ocean subpopulation
Dermatemydidae
Hickatee (Dermatemys mawii)
Kinosternidae
Crocodilia
Lizards
Diplodactylidae
Carphodactylidae
Eublepharidae
Sphaerodactylidae
Phyllodactylidae
Gekkonidae
Scincidae
Alopoglossidae
Daniel's largescale lizard (Alopoglossus danieli)
Gymnophthalmidae
Teiidae
Lacertidae
Amphisbaenidae
Varanidae
Mitchell's water monitor (Varanus mitchelli)
Diploglossidae
Anguidae
Chamaeleonidae
Agamidae
Leiocephalidae
Iguanidae
Tropiduridae
Haensch's whorltail iguana (Stenocercus haenschi) (possibly extinct)
Phrynosomatidae
Dactyloidae (Anolidae)
Liolaemidae
Leiosauridae
Snakes
Leptotyphlopidae
Gerrhopilidae
Typhlopidae
Xenotyphlopidae
Tropidophiidae
Boidae
Uropeltidae
Cylindrophiidae
Viperidae
Colubridae
Prosymnidae
Ornate shovel-snout (Prosymna ornatissima)
Pseudoxyrhophiidae
Elapidae
See also Lists of IUCN Red List critically endangered species List of least concern reptiles List of near threatened reptiles List of vulnerable reptiles List of endangered reptiles List of recently extinct reptiles List of data deficient reptiles
References