The persecution of Zoroastrians has been recorded throughout the history of Zoroastrianism, an Iranian religion. The notably large-scale persecution of Zoroastrians began after the rise of Islam in the 7th century CE; both during and after the conquest of Persia by Arab Muslims, discrimination and harassment against Zoroastrians took place in the form of forced conversions and sparse violence. Muslims who arrived in the region after its annexation by the Rashidun Caliphate are recorded to have destroyed Zoroastrian temples, and Zoroastrians living in areas that had fallen under Muslim control were required to pay a tax known as jizya.

Zoroastrianism, also known as Mazdayasna and Behdin, is an Iranian religion. One of the world's oldest organized faiths, it is based on the teachings of the Avesta and the Iranian prophet Zoroaster. Zoroastrians exalt an uncreated and benevolent deity of wisdom, commonly referred to as "Ahura Mazda", as the universe's supreme being; opposed to Ahura Mazda is "Angra Mainyu", who is personified as a destructive spirit and the adversary of all things good. Zoroastranism combines a dualistic cosmology of good and evil with an eschatology predicting the ultimate triumph of Ahura Mazda over evil. Opinions vary among scholars as to whether Zoroastrianism is monotheistic, polytheistic, or henotheistic. Some assert that it combines elements of all three.