Rudolf Rettberg (25 November 1916 — 28 October 1981) was a Sturmbannführer (Major) in the Waffen-SS during World War II. He was awarded the Knight's Cross of the Iron Cross, which was awarded to recognize extreme battlefield bravery or successful military leadership by Nazi Germany during World War II. It was awarded by Oberstgruppenführer Josef "Sepp" Dietrich (General), in what became known as Dietrich awards, who had the authority to make these awards through authorisation of the Heerespersonalamt of 22.4.1945 and 3.5.1945.