Archaeocyon ("ancient dog") is an extinct genus of the Borophaginae subfamily of canids native to North America.

Fossils have been found across the northern Great Plains and along the west coast of North America.

Its dentition (teeth) suggests a slightly more hypocarnivorous (omnivorous) diet than the otherwise similar Hesperocyon.

The skeleton is also generalized, lacking specializations for running and retaining a plantigrade foot posture.

The temporal position of Archaeocyon suggests an affinity to borophagines because the first members of Caninae appear substantially earlier.