Dyoplosaurus (meaning "double-armored lizard") is the name given to a genus of ankylosaurid dinosaur. It lived during the Late Cretaceous (Dinosaur Park Formation, about 76.5 Ma ago) near what is now the Red Deer River in Alberta, Canada and was named by William Parks in 1924, based on holotype ROM 784, a partial skeleton including parts of the skull and lower jaws.