| Named By: | C. W. Hibbard in 1934 |
| Time Period: | Middle Miocene-Late Miocene |
| Location: | USA, Arizona - Big Sandy Formation, Quiburis Formation, Kansas - Edson & Oklahoma - Ogallala Formation |
| Size: | About 60-90 high at the shoulder, and around 2-2.4 meters long |
| Diet: | Carnivore |
| Fossil(s): | Partial remains of several individuals |
| Classification: | | Chordata | Mammalia | Carnivora | Felidae | Machairodontinae | Metailurini | |
Adelphailurus is an extinct genus of saber-toothed cats of the family Felidae and tribe Metailurini which inhabited western North America during the Miocene, living from 10.3--5.33 Ma and existing for approximately 4.97 million years.