In Christianity, the Biblical Magi (/ˈmeɪdʒaɪ/ MAY-jy or /ˈmædʒaɪ/ MAJ-eye; singular: magus), also known as the Three Wise Men, Three Kings, and Three Magi, are distinguished foreigners who visit Jesus after his birth, bearing gifts of gold, frankincense, and myrrh in homage to him. In Western Christianity, they are commemorated on the feast day of Epiphany—sometimes called "Three Kings Day"—and commonly appear in the nativity celebrations of Christmas. In Eastern Christianity, they are commemorated on Christmas day.

The Magi appear solely in the Gospel of Matthew, which states that they came "from the east" (Greek: ἀπὸ ἀνατολῶν, romanized: apo anatolōn) to worship the "one who has been born king of the Jews". Their names, origins, appearances, and exact number are unmentioned and derive from the inferences or traditions of later Christians. In Western Christianity and Eastern Orthodox Christianity, they are usually assumed to have been three in number, corresponding with each gift; in Syriac Christianity, they often number twelve. Likewise, the Magi's social status is never stated: although some biblical translations describe them as astrologers, they were increasingly identified as kings by at least the third century, which conformed with Christian interpretations of Old Testament prophecies that the messiah would be worshipped by kings.

The mystery of the Magi's identities and background, combined with their theological significance, has made them prominent figures in the Christian tradition; they are venerated as saints or even martyrs in many Christian communities, and are the subject of numerous artworks, legends, and customs. Both secular and Christian observers have noted that the Magi popularly serve as a means of expressing various ideas, symbols, and themes. Many scholars regard the Magi as legendary rather than historical figures.

Traditional nativity scenes depict three "wise men" visiting the infant Jesus on the night of his birth, in a manger accompanied by the shepherds and angels, but this should be understood as an artistic convention allowing the two separate scenes of the Adoration of the Shepherds on the birth night and the later Adoration of the Magi to be combined for convenience. The single biblical account in Matthew 2 simply presents an event at an unspecified point after Jesus's birth in which an unnumbered party of unnamed "wise men" (μάγοι, mágoi) visits him in a house (οἰκίαν, oikian), not a stable. The New Revised Standard Version of Matthew 2:1–12 describes the visit of the Magi in this manner:

In the time of King Herod, after Jesus was born in Bethlehem of Judea, wise men from the East came to Jerusalem, asking, "Where is the child who has been born king of the Jews? For we observed his star at its rising, and have come to pay him homage." When King Herod heard this, he was frightened and all Jerusalem with him; and calling together all the chief priests and scribes of the people, he inquired of them where the Messiah was to be born. They told him, "In Bethlehem of Judea; for so it has been written by the prophet: 'And you, Bethlehem, in the land of Judah, are by no means least among the rulers of Judah; for from you shall come a ruler who is to shepherd my people Israel.'" Then Herod secretly called for the wise men and learned from them the exact time when the star had appeared. Then he sent them to Bethlehem, saying, "Go and search diligently for the child; and when you have found him, bring me word so that I may also go and pay him homage." When they had heard the king, they set out; and there, ahead of them, went the star that they had seen at its rising, until it stopped over the place where the child was. When they saw that the star had stopped, they were overwhelmed with joy. On entering the house, they saw the child with Mary his mother; and they knelt down and paid him homage. Then, opening their treasure chests, they offered him gifts of gold, frankincense, and myrrh. And having been warned in a dream not to return to Herod, they left for their own country by another path.

The text specifies no interval between the birth and the visit, and artistic depictions and the closeness of the traditional dates of December 25 and January 6 encourage the popular assumption that the visit took place the same winter as the birth, but later traditions varied, with the visit taken as occurring up to two winters later. This maximum interval explained Herod's command at Matthew 2:16–18 that the Massacre of the Innocents included boys up to two years old. Some more recent commentators, not tied to the traditional feast days, suggest a variety of intervals.

The wise men are mentioned twice shortly thereafter in verse 16, in reference to their avoidance of Herod after seeing Jesus, and what Herod had learned from their earlier meeting. The star which they followed has traditionally become known as the Star of Bethlehem.

The Magi are popularly referred to as wise men and kings. The word magi is the plural of Latin magus, borrowed from Greek μάγος (magos), as used in the original Greek text of the Gospel of Matthew (in the plural: μάγοι, magoi). The Greek magos itself is derived from Old Persian maguŝ, which in turn originated from the Avestan magâunô, referring to the Iranian priestly caste of Zoroastrianism. Within this tradition, priests paid particular attention to the stars and gained an international reputation for astrology, which was at that time highly regarded as a science. Their religious practices and astrological abilities caused derivatives of the term Magi to be applied to the occult in general and led to the English term magic.