| Named By: | Franz Nopsca in 1928 |
| Time Period: | Late Cretaceous, 76.5 Ma |
| Location: | Canada, Alberta - Dinosaur Park Formation. USA - Montana - Two Medicine Formation |
| Size: | Roughly about 6-6.5 meters long |
| Diet: | Herbivore |
| Fossil(s): | Based upon an almost complete skeleton with osteoderms and skin impressions. Additional remains attributed to the genus |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ankylosauridae | Ankylosaurinae | |
| Also known as: | | Oohktokia | |
Scolosaurus is an extinct genus of ankylosaurid dinosaurs within the subfamily Ankylosaurinae. It is known from either the lower levels of the Dinosaur Park Formation or upper levels of the Oldman Formation (the location of the type specimen's quarry is uncertain) in the Late Cretaceous (latest middle Campanian stage, about 76.5 Ma ago) of Alberta, Canada. It contains a single species, Scolosaurus cutleri. It is the oldest known North American ankylosaurid.