Manethon (or Manetho; /ˈmænθ/; [Μανέθων, Manethōn, or Μανέθως, Manethōs] error: {{lang-xx}}: text haes italic markup (help)) wis an Egyptian historian an priest frae Sebennytos (auncient Egyptian: Tjebnutjer) who lived during the Ptolemaic era, approximately during the 3rd century BC.

Manetho wrote the Aegyptiaca (History o Egyp). His wirk is o great interest tae Egyptologists, an is eften uised as evidence for the chronology o the reigns o pharaohs. The earliest an anly survivin reference tae Manetho's Aegyptiaca is that o the Jewish historian Josephus in his wirk "Against Apion".