| Named By: | A. P. Hunt & S. G. Lucas in 1993 |
| Time Period: | Late Cretaceous, 73 Ma |
| Location: | USA, New Mexico - Kirtland Formation |
| Size: | Preserved length of the holotype skull about 63 centimetres long.Reconstructed length of the skull roughly about 83 centimetres long |
| Diet: | Herbivore |
| Fossil(s): | Partial skull and partial post cranial skeletal remains |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | Iguanodontia | Hadrosauridae | Hadrosaurinae | |
Naashoibitosaurus (from Navajo na'asho'ii bitooh--"lizard creek") is a genus of hadrosaurid dinosaur that lived about 73 million years ago, in the Late Cretaceous, and was found in the Kirtland Formation of the San Juan Basin in New Mexico, United States. Only a partial skeleton has been found to date. It was first described as a specimen of Kritosaurus by Jack Horner, and has been intertwined with Kritosaurus since its description.