| Named By: | William Berryman Scott in 1890 |
| Time Period: | Late Eocene-Early Oligocene |
| Location: | Canada - Saskatchewan. USA - Colorado, Montana, Nebraska, North Dakota, South Dakota and Wyoming |
| Size: | Around 80 centimetres long |
| Diet: | Carnivore |
| Fossil(s): | Remains of well over 150 individuals |
| Classification: | | Chordata | Mammalia | Carnivora | Canida | Hesperocyoninae | |
| Also known as: | | Alloeodectes mcgrewi | Amphicyon gracilis | Canis gregarius | Cynodictis gregarius | Cynodictis hylactor | Cynodictis paterculus | Galecynus gregarius | Hesperocyon paterculus | Nanodelphys mcgrewi | Peradectes mcgrewi | Pseudocynodictis gregarius | Pseudocynodictis paterculus | |
Hesperocyon is an extinct genus of canids (subfamily Hesperocyoninae,family Canidae) that was endemic to North America, ranging from southern Canada to Colorado. It appeared during the Uintan age-Bridgerian age (NALMA) of the Mid-Eocene 42.5 mya--31.0 Ma. (AEO). Hesperocyon existed for approximately 11.5 million years.