Georg von Dadelsen (17 November 1918 – 25 May 2007) was a German musicologist, who taught at the University of Hamburg and the University of Tübingen. He focused on Johann Sebastian Bach, his family and his environment, and the chronology of his works. As director of the Johann Sebastian Bach Institute in Göttingen, he influenced the Neue Bach-Ausgabe (NBA), the second complete edition of Bach's works.