| Named By: | Eberhard Fraas in 1904 |
| Time Period: | Middle Eocene |
| Location: | Egypt - Guishi Formation (E. schweinfurthi). USA, North Carolina - Castle Hayne Formation (E. wardii). Isolated vertebrae from Germany, Ukraine and the US state of Virginia have also been considered to be from Eocetus |
| Size: | Skull 96 centimetres long |
| Diet: | Carnivore/Piscivore |
| Fossil(s): | Skull for E. schweinfurthi, Partial skull and post cranial remains for E. wardii |
| Classification: | | Chordata | Mammalia | Cetacea | Archaeoceti | Protocetidae | |
| Also known as: | | Zeuglodon macrospondylus | Mesocetus schweinfurthi | |
Eocetus is an extinct protocetid early whale known from the early late Middle Eocene (Bartonian, 40.4 to 37.2 million years ago) Giushi Formation in Gebel Mokattam, (30.0degN 31.3degE / 30.0; 31.3, paleocoordinates 24.9degN 26.8degE / 24.9; 26.8) outside Cairo, Egypt. Since the genus was first described in the early 20th century, several other specimens, mostly isolated vertebrae, have been attributed to Eocetus, but the taxonomic status of these widely distributed specimens remain disputed.