| Named By: | Patterson in 1941 |
| Time Period: | Oligocene-Early Miocene (Deseadan)~29.0-21.0 Ma |
| Location: | Argentina |
| Size: | Up to 1.7 meters tall |
| Diet: | Carnivore |
| Fossil(s): | Enough fossils to represent a single species |
| Classification: | | Chordata | Aves | Cariamae | Phorusrhacidae | Patagornithinae | |
Andrewsornis is an extinct genus of giant flightless predatory birds of the family Phorusrhacidae or "terror birds" that lived in Argentina. Fossils have been found in the Agua de la Piedra Formation.