Othnielia are small animals, 2 meters (6.6 ft) or less in length and 10 kilograms (22 lb) or less in weight. They are bipedal dinosaurs with short forelimbs and long hindlimbs with large processes for muscle attachments. The hands were short and broad with short fingers. It had small leaf-shaped cheek teeth (triangular and with small ridges and denticles lining the front and back edges), and a large front tooth much like a sharp beak.
Othnielia are omnivores. They are well suited to eating just about anything and that’s what they do.
Othnielia are found singly or in mated pairs.