As of July 2016, the International Union for Conservation of Nature (IUCN) lists 2875 data deficient arthropod species. 30% of all evaluated arthropod species are listed as data deficient. The IUCN also lists 17 arthropod subspecies as data deficient. No subpopulations of arthropods have been evaluated by the IUCN. This is a complete list of data deficient arthropod species and subspecies as evaluated by the IUCN.