This list of the Mesozoic life of Colorado contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Colorado and are between 252.17 and 66 million years of age.
Diagram illustrating the Late Jurassic sauropod dinosaurs Diplodocus carnegii (green) and D. hallorum (orange) with an anachronistic human to scale. †Diplodocus – type locality for genus
Skeletal reconstruction and restored soft tissue of the Late Cretaceous duck-billed dinosaur Edmontosaurus regalis with an anachronistic human to scale †Edmontosaurus
Restoration in multiple views of the Late Jurassic sauropod dinosaur Supersaurus with an anachronistic human to scale †Supersaurus – type locality for genus
^ abNeil H. Landman; W. James Kennedy; Neal L. Larson; Joyce C. Grier; James W. Grier; Tom Linn (2019). "Description of two species of Hoploscaphites (Ammonoidea, Ancyloceratina) from the Upper Cretaceous (Lower Maastrichtian) of the U.S. Western Interior". Bulletin of the American Museum of Natural History. 2019 (427): 1–72. doi:10.1206/0003-0090.427.1.1. hdl:2246/6926. S2CID 91263199.
Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.