Singet dem Herrn ein neues Lied, BWV 190, is a church cantata by Johann Sebastian Bach. He wrote it in Leipzig for the New Year's Day and first performed it on 1 January 1724 as part of his first cantata cycle. He adapted it in 1730 to Singet dem Herrn ein neues Lied, BWV 190a, for the celebration of the bicentennial of the Augsburg Confession.

The cantatas composed by Johann Sebastian Bach, known as Bach cantatas, are a body of work consisting of over 200 surviving independent works, and at least several dozen that are considered lost. As far as known, Bach's earliest cantatas date from 1707, the year he moved to Mühlhausen, although he may have begun composing them at his previous post in Arnstadt. Most of Bach's church cantatas date from his first years as Thomaskantor and director of church music in Leipzig, a position which he took up in 1723.