Navajosphenodon is an extinct genus of sphenodontid reptile from the Early Jurassic Kayenta Formation of Arizona, United States.

It is known from a fully articulated skeleton and is similar in many aspects to the extant tuatara, both belonging to the Sphenodontinae, including sharing a complete lower temporal bar.

It is one of the oldest known sphenodontines.

[1] †Diphydontosaurus †Planocephalosaurus †Clevosaurus †Homoeosaurus †Pleurosauridae †Leptosaurus +†Kallimodon †Sapheosauridae †Eilenodontinae †Navajosphenodon †Cynosphenodon †Sphenofontis †Kawasphenodon Sphenodon (tuatara)

This article related to a Jurassic reptile is a stub.