Neferkare Setepenre Ramesses IX was the eighth pharaoh of the Twentieth Dynasty of Egypt. He was the third longest serving king of this Dynasty after Ramesses III and Ramesses XI. He is now believed to have assumed the throne on I Akhet day 21 based on evidence presented by Jürgen von Beckerath in a 1984 GM article. According to the latest archaeological information, Ramesses IX died in Regnal Year 19 I Peret day 27 of his reign. Therefore, he enjoyed a reign of 18 years, 4 months and 6 days. His throne name, Neferkare Setepenre, means "Beautiful Is The Soul of Re, Chosen of Re." Ramesses IX is believed to be the son of Mentuherkhepeshef, a son of Ramesses III, since Mentuherkhopshef's wife, the lady Takhat bears the prominent title of King's Mother on the walls of tomb KV10, which she usurped and reused in the late 20th Dynasty; no other 20th Dynasty king is known to have had a mother with this name. Ramesses IX was, therefore, probably a grandson of Ramesses III.

The Abbott Papyrus serves as an important political document concerning the tomb robberies of the Twentieth Dynasty of Egypt during the New Kingdom. It also gives insight into the scandal between the two rivals Pawero and Paser of Thebes.