Phlaocyon mariae is an extinct species of the genus Phlaocyon, belonging to the subfamily Borophaginae and tribe Phlaocyonini, a canid which inhabited central western North America from the Miocene living 20.6—16.3 Ma, and existed for approximately 4.3 million years. Phlaocyon mariae was described and named by , the name honours S. Marie Skinner who assembled and documented specimens from Nebraska. The species is known from worn upper and lower teeth and skull fragments found at the Early Hemingfordian Aletomeryx Quarry Site, Runningwater Formation, Cherry County, Nebraska.