| Named By: | Dale Russel in 1996 |
| Time Period: | Upper Cretaceous, 100-94 Ma |
| Location: | Morocco - Kem Kem Formation |
| Size: | Uncertain due to lack of remains |
| Diet: | Carnivore/Piscivore |
| Fossil(s): | Cervical (neck) vertebrae |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Theropoda | Spinosauridae | |
| Also known as: | | Spinosaurus maroccanus | |
Sigilmassasaurus ( see-jil-MAH-sa-SAW-ras; "Sijilmassa lizard") is an extinct genus of tetanuran theropod dinosaur that lived approximately 100 to 94 million years ago during the middle of the Cretaceous Period in what is now northern Africa. Sigilmassasaurus was a moderately-built, ground-dwelling, bipedal carnivore, like most other theropods.