| Named By: | William A. Parks in 1924 |
| Time Period: | Late Cretaceous, 76.5 Ma |
| Location: | Canada, Alberta - Dinosaur Park Formation |
| Size: | Uncertain due to lack of complete remains, but estimated between 4 and 5 meters long |
| Diet: | Herbivore |
| Fossil(s): | Partial skeleton, mostly of the posterior half as well as incomplete skull and jaws |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Thyreophora | Ankylosauridae | Ankylosaurinae | |
Dyoplosaurus (meaning "double-armored lizard") is an extinct genus of ankylosaurid dinosaurs within the subfamily Ankylosaurinae. It is known from the lower levels of the Late Cretaceous Dinosaur Park Formation (latest middle Campanian stage, about 76.5 Ma ago) of Alberta, Canada. It contains a single species, Dyoplosaurus acutosquameus.