Shahriyar I (Persian: شهریار) was the sixth ruler of theBavand dynasty from 817 to 825. He was the grandson and successor ofSharwin I. Before Shahriyar became ruler of the Bavand dynasty, he was taken as hostage byHarun al-Rashid toBaghdad, where Shahriyar stayed for four years until he was allowed to return toTabaristan.

In 817, Sharwin I died, and Shahriyar succeeded him. After Shahriyar's coronation, theAbbasidcaliphal-Ma'mun, sent himrobes of honour, and requested his and theQarinvand ruler Qarin ibn Vindadhhurmuzd's aid in theArab–Byzantine wars. Shahriyar declined the request, while Qarin accepted, and became successful in his campaign against the Byzantines.^[1] Qarin was then bestowed with many honors by Al-Ma'mun. Shahriyar, jealous of Qarin's fame, began annexing some of the latter's territory. In 817, during the reign of Qarin's sonMazyar, Shahriyar, with the aid of Mazyar's uncle Vinda-Umid, expelled the latter from Tabaristan, and seized all his territories. Shahriyar later died in 825, and was succeeded by his sonShapur.^[1]

• Madelung, W. (1975)."The Minor Dynasties of Northern Iran". In Frye, R.N. (ed.).The Cambridge History of Iran, Volume 4: From the Arab Invasion to the Saljuqs. Cambridge: Cambridge University Press. pp. 198–249.ISBN 978-0-521-20093-6.

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