| Named By: | Agassiz in1843 |
| Time Period: | Middle Jurassic-Late Cretaceous |
| Location: | Europe including England, France and Germany |
| Size: | About 60 centimetres long |
| Diet: | Carnivore |
| Fossil(s): | Many individuals |
| Classification: | | Chordata | Gnathostomata | Osteichthyes | Aspidorhynchiformes | Aspidorhynchidae | |
Aspidorhynchus (meaning "shield snout") is an extinct genus of ray-finned fish from the Jurassic and Cretaceous periods. Fossils have been found in Europe and Antarctica.
Aspidorhynchus was a slender, fast-swimming fish, 60 centimetres (2.0 ft) long, with tooth-lined, elongated jaws. It also had heavy scales and a symmetrical tail. The upper jaw was longer than the lower jaw, ending in a toothless spike. Although it would have looked superficially similar to the present day gar, its closest living relative is actually the bowfin.