Nun komm, der Heiden Heiland (orig.: Nu kom der Heyden heyland, Engl.: Now come, Saviour of the gentiles) is a Lutheran chorale of 1524 with words written by Martin Luther, based on Veni, redemptor gentium by Saint Ambrose. The chorale was used as the prominent hymn for the first Sunday of Advent for centuries. It was used widely in organ settings by Protestant baroque composers. It is now best known as the base for Johann Sebastian Bach's chorale cantata Nun komm, der Heiden Heiland, BWV 62 (1724) and the opening movement of his cantata Nun komm, der Heiden Heiland, BWV 61 (1714).
This chorale continues in modern usage, both in liturgically oriented Christian hymnals (for example, the Lutheran Book of Worship) and as the cantus firmus for organ compositions.