| Named By: | Bardet & Fernandez in 2000 |
| Time Period: | Late Jurassic-Early Cretaceous, Tithonian-Valanginian |
| Location: | Germany, France |
| Size: | Under 2 meters long |
| Diet: | Piscivore/carnivore |
| Fossil(s): | Several specimens |
| Classification: | | Chordata | Reptilia | Ichthyosauria | Ophthalmosauridae | Platypterygiinae | |
| Also known as: | | Ichthyosaurus leptospondylus | |
Aegirosaurus is an extinct genus of platypterygiine ophthalmosaurid ichthyosaur known from the Late Jurassic and Early Cretaceous of Europe.