Navajovius is an extinct genus of plesiadapiforms that lived during the Paleocene epoch (66 to 56 million years ago).

[3] This genus was officially named in 1921 by Walter Granger and William Matthew and the type specimen is housed at the American Museum of Natural History.

[6] The genus Navajovius was named by Matthew and Granger in 1921 for the Navajo Mountains north of the San Juan River, close to the place of its discovery.

[8] Navajovius has also been placed in the subfamily Uintasoricinae within the family Microsyopidae [9] and into the superfamily Paromomyoidea under the tribe Navajoviini in 1979.

Very few fossils belonging to this genus have been found, limiting the descriptive material to lower jaws, maxillae, and fragmentary teeth (Gunnell 1989).

[5] A gap between the anterior dentition and cheek teeth is considered to be a space for the canine by some and a diastema by others, accounting for some of this disagreement.

All of these localities are considered to be from the Tiffanian North American Land Mammal Age (NALMA) and date back to the late Paleocene Epoch, about 61.7 to 56.8 million years ago.

[3] As plesiadapiforms are largely thought to be arboreal, it can be assumed that the western United States was covered in forests during this time.

Based on dental morphology, Navajovius most likely had a generalized diet, eating a variety of foods possibly including insects, fruits, and tree sap.