| Named By: | A. Azzaroli, C. De Giuli, G. Ficcarelli & D. Torre in 1972 |
| Time Period: | Maastrichtian |
| Location: | Niger. Nigeria - Dukamaje Formation (Gypsiferous shale Member), Rima Formation (Dukamaje Member ) |
| Size: | Estimated between 6 and 7 meters long |
| Diet: | Carnivore |
| Fossil(s): | Partial skull and post cranial remains |
| Classification: | | Chordata | Reptilia | Squamata | Mosasauridae | |
| Also known as: | | Mosasaurus nigeriensis | |
Goronyosaurus nigeriensis is a 6-8 meter long species of crocodile-like mosasaur from the Late Cretaceous (Maastrichtian) Dukamaje Formation of Sokoto State, Niger and northwestern Nigeria.