| Named By: | Ernst Stromer von Reichenbach in 1917 |
| Time Period: | Albian-Maastrichtian |
| Location: | Mostly North Africa, but evidence suggests a cosmopolitan distribution |
| Size: | 8 meters long |
| Diet: | unavailable |
| Fossil(s): | Usually just the barbs and parts of the rostrum |
| Classification: | | Chordata | Chondrichthyes | Elasmobranchii | Batoidea | Rajiformes | Pristiformes | Pristidae | |
| Also known as: | | Platyspondylus | |
Onchopristis is a genus of extinct giant sawfish that lived in the Lower Cretaceous to Upper Cretaceous in North Africa and New Zealand. It had an elongated snout lined laterally with barbed teeth.