Johannes Gustav "Hans" Winckelmann (14 September 1881 – 9 October 1943) was a German operatic tenor and opera director.
Other ancestors included Johann Joachim Winckelmann, Hans was trained by his father to play Wagnerian tenor and studied in Vienna, where he obtained a doctorate in philosophy.
He began his career as a singer at the Vienna Volksoper and then became first tenor at the Prague Opera, later in Schwerin.
In his Schwerin period he made three films in Berlin in 1921 and 1922 and finally in Hanover, where he also directed about six operas a year with Rudolf Krasselt.
During the air raids on Hanover he sent his advanced pregnant wife to Salzburg, where his daughter Maria was born.