What is the state fossil of South Dakota?

The state fossil of South Dakota is the Triceratops. This iconic dinosaur, known for its large bony frill and three facial horns, roamed the region millions of years ago during the late Cretaceous period. The Triceratops was one of the largest herbivores of its time and is one of the most famous dinosaurs to be found in the state. Fossils of this dinosaur are regularly discovered in South Dakota’s Badlands and other regions, making it a key part of the state’s paleontological history. The Triceratops was officially designated as the state fossil in 1988.