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Wyoming State Dinosaur

Triceratops at the American Museum of Natural History in New York City dinosaur symbol of Wyoming. Photo by David Bruce / Flickr (noncommercial use permitted with attribution/no derivative works).

Official State Dinosaur of Wyoming

Wyoming designated triceratops as the official state dinosaur in 1994 (Wyoming also has a state fossil, adopted in 1987). All State Dinosaurs & Fossils

One of the largest horned dinosaurs, the iconic Triceratops lived in Wyoming over 65 million years ago during the Cretaceous Period. The fearsome-looking horns and frill were used for defense and display - Triceratops was a vegetarian.