Sultan Sahak, or Soltân Sahak (Persian: سلطان سهاک) (born 14th century ; died 15th century) was a Kurdish religious leader who founded spiritual path of the Ahl-e Haqq, also known as the Yârsân. He is considered to be the manifestation that fully reflects the divine essence by the Ahl-e Haqq and revealer/expounder of the fourth stage of the religion.