Ahmose-Sitamun or just Sitamun was a princess of the early Eighteenth Dynasty of Egypt.

Her name Ahmose-Sitamun (sꜣt-jmn; Sat-Amun/Satamun) means "Child of the Moon, Daughter of Amun".

Sitamun was the daughter of Pharaoh Ahmose I and sister of Amenhotep I. Her titles were: King's Daughter (sꜣt-nsw); King's Sister (snt-nsw); God's Wife (ḥmt-nṯr) Her name was written in cartouche.

By Year 18 of Ahmose I (1570-1546 BC high chronology), her title string included King's Daughter and God's Wife. When her brother Amenhotep I (1545-1526 BC high chronology) became king, the title King's Sister was added to her title string.

A stela belonging to a subordinate of King's Daughter Satamun.

A limestone stela dating to Year 18 of Ahmose I where she is King's Daughter and God's Wife.

At Karnak, a limestone statue stood before the eighth pylon at Karnak. On this mounument she holds the titles King's Daughter, King's Sister and God's Wife. The title King's Sister should date this monument to the reign of her brother, Amenhotep I.

The Tomb of Sitamun has not been identified. Her mummy was found in a secondary context.