Teleosauridae is a family of extinct typically marine crocodylomorphs similar to the modern gharial that lived during the Jurassic period.

Amongst teleosauroids, teleosaurids were generally smaller and less common than machimosaurids, suggesting the two families occupied different niches, similar to modern species of crocodilians.

Additionally, teleosaurids occupied a wider range of habitats than machimosaurids, from semi-marine coasts and estuaries, the open-ocean, freshwater, and potentially even semi-terrestrial environments.

[2] Teleosauridae is phylogenetically defined in the PhyloCode by Mark T. Young and colleagues as "the largest clade within Teleosauroidea containing Teleosaurus cadomensis but not Machimosaurus hugii.

[2][4] Definitive fossils of teleosaurids are restricted to Laurasia, with material found in Europe(England, France, Germany, Italy, Portugal, Russia and Switzerland) and Asia (China and Thailand, and possibly India).