Userkare (also Woserkare, meaning "Powerful is the soul of Ra") was the second pharaoh of the Sixth Dynasty, reigning briefly, 1 to 5 years, in the late 24th to early 23rd century BC. Userkare's relation to his predecessor Teti and successor Pepi I is unknown and his reign remains enigmatic. Although he is attested in historical sources, Userkare is completely absent from the tomb of the Egyptian officials who lived during his reign. In addition, the Egyptian priest Manetho reports that Userkare's predecessor Teti was murdered and Userkare is often considered to have been a short-lived usurper. Alternatively, he may have been a regent who ruled during Teti's son's childhood who later ascended the throne as Pepi I.
Userkare is present on the Abydos King List, a list of kings written during the reign of Seti I (1290–1279 BC) over 1000 years after the early Sixth Dynasty. Userkare's cartouche occupies the 35th entry of the list, between those of Teti and Pepi I, making him the second pharaoh of the dynasty. Userkare was possibly also listed on the Turin canon, a king list composed during the reign of Ramesses II (1279–1213 BC). Unfortunately, a large lacuna affects the second line of the fourth column of the papyrus on which the list was written, the place were Userkare's name might have been located.