Angelosaurus dolani ('Dolan's Angel lizard', Olson & Berrbower 1953) was a pelycosaur (an extinct clade) of reptile. It is known from a partial skull from the Middle San Angelo Formation, Knox County, Texas, USA. It dates from the Kungurian (Early Permian). It was from three to three and a half metres long and weighed about 300 kilograms. It belongs to the family Caseidae. Like its contemporary, another caseid, Cotylorhynchus, it was large, heavily built, and herbivorous. It also shared its environment with the caseids Caseoides and Caseopsis. It may have been preyed upon by the large sphenacodont pelycosaur Dimetrodon.