Camarasaurus is an extinct species of sauropod dinosaur found in North America.

These Jurassic herbivorous dinosaurs lived between 155-145 million years ago and could between 7.5-25 meters long in length, weighing up to 23000kg (25.4 tons). Camarasaurus was one the most common herbivore dinosaurs to roam the Late Jurassic plains of western U.S.A with groups of fossils having been found that suggest it roamed in herds.