Ratu Kalinyamat or Ratna Kencana (died after 1579) was the queen regnant of Kalinyamat and Jepara, a Javanese Islamic polity on northern coast of Central Java in ca. 1549–1579. She is mainly known for her attack and navalexpeditions on Portuguese Malacca. She was the daughter of Sultan of Demak and the spouse of Sultan Hadlirin. Ratna Kencana ascended the throne after the assassination of her brother, , and her husband by Arya Penangsang.