Gunnar Johansen (January 21, 1906, Copenhagen – May 25, 1991, Blue Mounds, Wisconsin) was a Danish-born pianist and composer. He was one of the chief proponents of the music of Ferruccio Busoni, whose mature keyboard works he recorded in their entirety, as well as the complete keyboard works of Johann Sebastian Bach. Johansen was also a scholar, educator and humanist. His many humanitarian efforts included establishment of the Leonardo Academy, dedicated to the integration of the arts and sciences.