Adolphus Busch III (February 10, 1891 – August 29, 1946) was an American brewing magnate based in Saint Louis, Missouri who was the President and CEO of Anheuser-Busch from 1934 to 1946. He was the grandson of Adolphus Busch, the founder of the company, and the oldest of five children of August A. Busch, Sr. and his wife Alice Ziesemann. His younger brother August A. "Gussie" Busch, Jr. succeeded him as President and CEO.