Harpactognathus (meaning "seizing/grasping jaw") is a genus of pterosaur found in the Late Jurassic-age Morrison Formation of Albany County, Wyoming, United States.

It is based on NAMAL 101, a partial skull consisting of the snout, recovered from near Bone Cabin Quarry in 1996.

The specific name honors the discoverer, Joe Gentry, a volunteer for the Western Paleontological Laboratories, in Lehi, Utah.

[1] The holotype resides in the Stewart Museum of Paleontology at Ogden's George S. Eccles Dinosaur Park in northern Utah.

However, more recent publications have suggested scaphognathines lacked specializations for piscivory, and were likely terrestrial predators of small vertebrates or corvid-like generalists.