Herishef, also spelt as Heryshaf, was a ram-headed god in Egyptian mythology. His name means "He who is on his lake", possibly reflecting an origin from the large Faiyum oasis.

He is a God Who was exceptionally popular in Antiquity, with numerous feast days dotting Ancient calendars, and was even elevated to the status of Supreme High God of the unified Egyptian State during the 9th and 10th Dynasties under the Herakleopolitan Kings. (Thomas, 12) Despite His prominence in historical Egyptian religion, Herishef has since fallen into almost total obscurity. Among His epithets are “Mighty Phallus,” “Majesty of the Gods,” and “Lord of the Blood”