| Named By: | Edward Drinker Cope in 1874 |
| Time Period: | Late Eocene to Early Oligocene 38-33.3 Ma |
| Location: | Canada and the USA |
| Size: | Around 1.3 meters long and estimated up to 160 kilograms |
| Diet: | Carnivore |
| Fossil(s): | Multiple specimens |
| Classification: | | Chordata | Mammalia | Carnivore | Nimravidae | Hoplophoninae | |
| Also known as: | | Dinotomius | Drepanodon | Eusmilus dakotensis | Hoplophoneus insolens | Hoplophoneus latidens | Hoplophoneus marshi | Hoplophoneus molossus | Hoplophoneus oharrai | Hoplophoneus oreodontis | Hoplophoneus robustus | Machairodus occidentalis | Machaerodus oreodontis | Nanosmilus kurteni | |
Hoplophoneus is an extinct genus of the family Nimravidae, subfamily Nimravinae, endemic to North America during the Late Eocene to Early Oligocene epochs (38--33.3 mya), existing for approximately 3.9 million years.