As of September 2016, the International Union for Conservation of Nature (IUCN) lists 910 data deficient reptile species. 18% of all evaluated reptile species are listed as data deficient. Of the subpopulations of reptiles evaluated by the IUCN, two species subpopulations have been assessed as data deficient. This is a complete list of data deficient reptile species evaluated by the IUCN. Species which have data deficient subpopulations (or stocks) are indicated.