Bisutun (بيستون) (died 977) was the ruler of the Ziyarids (967–977). He was the eldest son of Vushmgir.
During his father's lifetime, Bisutun was the governor of Tabaristan Amol. Upon Vushmgir's death in 967 during a hunting expedition, he went to Gurgan to assume power. His ascension was contested, however, by a Samanid army which had arrived shortly before Vushmgir's death for a joint campaign against the Buyid Rukn al-Dawla. The army commander supported making Bisutun's brother Qabus as ruler of the Ziyarids. Bisutun then turned to Rukn al-Dawla, recognizing the latter's sovereignty in an attempt to gain support. The Samanid army soon left Gurgan, returning to Khurasan, but Qabus found the support of al-Hasan ibn al-Fairuzan, who was ruling in Simnan at that time. Bisutun eventually managed to conquer both Gurgan and Simnan, forcing Qabus to give up his claims.
