Eodromaeus, meaning "dawn runner," is an extinct genus of probable basal theropod dinosaurs that lived during the Late Triassic period in Argentina. It originates from the Ischigualasto Formation, which is part of the Ischigualasto-Villa Unión Basin in northwestern Argentina and dates back to the Carnian age, approximately 230 million years ago.

When first discovered, Eodromaeus was thought to be one of the earliest genuine theropods, displacing its contemporary Eoraptor, which was later reinterpreted as a basal sauropodomorph. Eodromaeus was relatively small, in line with most Carnian dinosaurs, except for the herrerasaurids. A press release estimated its total length at around 1.2 meters (3.9 feet) from nose to tail, with a weight ranging from 4.5 to 6.8 kilograms (9.9 to 15.0 pounds).

Initially described in 2011, Eodromaeus was considered the earliest member of the Theropoda group, which encompasses the majority of carnivorous dinosaurs, including famous ones like Tyrannosaurus, Allosaurus, and Velociraptor, as well as the only surviving dinosaurs, birds. Eodromaeus was categorized as one of the most basal theropods and was positioned outside the Neotheropoda group, which includes coelophysoids and later Triassic theropods.