John the Baptist (Hebrew: יוחנן המטביל, Yoḥanan ha-mmaṭbil, Arabic: يحيى بن زكريا‎ Yahya ibn Zakariya^[1], Aramaic: ܝܘܚܢܢ Yoḥanan, Greek: Ὁ Ἅγιος/Τίμιος Ἐνδοξος Προφήτης, Πρόδρομος καὶ Βαπτιστής Ἰωάννης Ho Hagios/Timios Endoxos, Profetes, Prodromos, kai Baptistes Ioannes)^[2][3][4][5] (c. 6 BC – c. AD 30-36) was an itinerant preacher^[6] and a major religious figure^[7] mentioned in the Canonical gospels. He is described in the Gospel of Luke as a relative of Jesus^[8] who led a movement of baptism at the Jordan River.^[9] Some scholars maintain that he was influenced by the Essenes, who were semi-ascetic, expected an apocalypse, and practiced rituals corresponding strongly with baptism,^[10] although there is no direct evidence to substantiate this.^[11] John is regarded as a prophet in Christianity, Islam,^[12] the Bahá'í Faith,^[13] and Mandaeism.

Most biblical scholars agree that John baptized Jesus at "Bethany beyond the Jordan," by wading into the water with Jesus from the eastern bank.^[14][15] John the Baptist is also mentioned by Jewish historian Josephus, in Aramaic Matthew, in Pseudo-Clementine, and in the Qur'an.^[16] Accounts of John in the New Testament appear compatible with the account in Josephus.^[17] There are no other historical accounts of John the Baptist from around the period of his lifetime.