| Named By: | Pierce Brodkorb in 1963 |
| Time Period: | Blancan-Gelasian,[1] 4.9-1.8 Ma |
| Location: | USA, Florida, Texas |
| Size: | Estimated at 2.5 meters tall |
| Diet: | Carnivore |
| Fossil(s): | Multiple but fragmentary post cranial remains |
| Classification: | | Chordata | Aves | Cariamae | Phorusrhacidae | Phorusrhacinae | |
Titanis walleri is a large extinct flightless carnivorous bird of the family Phorusrhacidae, endemic to North America during the Blancan stage of the Pliocene living 4.9--1.8 Ma, and died out during the Gelasian Age of the earliest Pleistocene, existing approximately 3.1 million years. It was 2.5 metres (8.2 ft) tall and weighed approximately 150 kilograms (330 lb).