Qabus ibn Wushmagir (full name: Abol-Hasan Qābūs ibn Wušmagīr ibn Ziyar Sams al-maʿālī, ابوالحسن قابوس بن وشمگیر بن زیار, شمس المعالی; (died 1012) (r. 977–981; 997–1012) was the Ziyarid ruler of Gurgan and Tabaristan in medieval Iran. He was the son of Vushmgir and a daughter of the Bavandi Ispahbad Sharwin II.