Manetho was an ancient Egyptian historian and priest from Sebennytos. He lived during the Ptolemaic era, in about 300 BC.

Manetho wrote the Aegyptiaca (History of Egypt). His book is used by Egyptologists to work out the dates for events in ancient Egypt. The earliest reference to Manetho's Aegyptiaca is in Jewish historian Josephus's book, "Against Apion".