William F. Lorenz (February 15, 1882 – February 19, 1958) was a Major (O4) in the United States Army Medical Corps during World War I. He was awarded the Army Distinguished Service Medal for his combat actions in France, and had previously served a tour of duty during the Spanish–American War in 1898. Lorenz was also a prominent faculty member at the University of Wisconsin Medical School in Madison, Wisconsin, in the department of Neuropsychiatry. He remained in the U.S. Army National Guard after his service in Europe, attaining the rank of Lieutenant Colonel (O5).