Userkaf (known in Ancient Greek as Οὐσερχέρης, Usercherês) was a pharaoh of ancient Egypt and the founder of the Fifth Dynasty. He reigned for seven to eight years in the early 25th century BC, during the Old Kingdom period. He probably belonged to a branch of the Fourth Dynasty royal family, although his parentage is uncertain; he could have been the son of Khentkaus I. He had at least one daughter and very probably a son, Sahure, with his consort Neferhetepes. This son succeeded him as pharaoh.