Lothar Zagrosek (born 13 November 1942 in Otting, Germany) is a German conductor. As a youth, he sang in the Regensburg Cathedral choir, including performances as the First Boy in The Magic Flute at the 1954 Salzburg Festival. From 1962 to 1967, Zagrosek studied conducting with Hans Swarowsky, István Kertész, Bruno Maderna and Herbert von Karajan.