Archaeocyon ("beginning dog") is a small extinct genus of the Borophaginae within the family Canidae (terrestrial canine) which inhabited most of North America during the Whitneyan stage through Geringian stage of the Oligocene epoch 33.3—26.3 Ma Archaeocyon existed for approximately 7.3 million years. Species of Archaeocyon are among the earliest known borophagines, although a species of Otarocyon has a slightly earlier first appearance.