Ornithoscelida is an extinct taxonomic clade of dinosauromorphs, which includes a variety of stem-group dinosaurs. This clade encompasses a wide range of animals, from small, carnivorous theropods to large herbivorous sauropods. It is believed to have existed during the Late Triassic period, and fossils have been found in Europe and North America.

The clade's name is derived from the Latin words "Ornitho", meaning "bird", and "scelida", meaning "legs".