Dinosaur is a statutory town in Moffat County, Colorado, United States. As of the 2020 census, the population was 243, down from 339 at the 2010 census. Dinosaur is a part of the Craig, CO Micropolitan Statistical Area. The town of Dinosaur was originally known as "Baxter Springs", owned by Art and Fanny Baxter. It was renamed "Artesia" for its valued water supply when a town was platted to accommodate the oil boom in the 1940s.