| Named By: | Lambert, Bianucci & Muizon in 2008 |
| Time Period: | Late Miocene (Laventan-Montehermosan)~13.65-5.332 Ma |
| Location: | Peru |
| Size: | Estimated at 4 meters long |
| Diet: | Carnivore |
| Fossil(s): | Partial skull and mandible (lower jaw) |
| Classification: | | Chordata | Mammalia | Cetacea | Physeteroidea | |
Acrophyseter is a genus of stem-sperm whales that lived around 12-7 million years ago (Laventan to Montehermosan) in waters off the coast of Peru.