| Named By: | P. D. Gingerich, M. alinHaq, W. Koenigswald, W. J. Sanders, B. H. Smith & I. S. Zalmut in 2009 |
| Time Period: | Middle Eocene |
| Location: | Pakistan - Habib Rahi Formation |
| Size: | About 2.6 meters long |
| Diet: | Carnivore/Piscivore |
| Fossil(s): | Skulls and partial post cranial remains, possibly of male and female individuals |
| Classification: | | Chordata | Mammalia | Cetacea | Archaeoceti | Protocetidae | |
Maiacetus ("mother whale") is a genus of early middle Eocene (c. 47.5 mya) cetacean from Pakistan.