| Named By: | Moreno and MerceratFrancisco P. Moreno & Alcides Mercerat in 1891 |
| Time Period: | Middle Miocene |
| Location: | Argentina, Santa Cruz Province |
| Size: | Up to 1.7 meters high |
| Diet: | Carnivore |
| Fossil(s): | Fossils to identify one species |
| Classification: | | Chordata | Aves | Cariamae | Phorusrhacidae | Patagornithinae | |
Patagornis is a genus of extinct, giant, flightless, predatory birds of the family Phorusrhacidae. Known as "terror birds", these lived in what is now Argentina during the early and middle Miocene; the Santa Cruz Formation in Patagonia contains numerous specimens.