Horst Stumpff (20 November 1887 – 25 November 1958) was a German general in the Wehrmacht during World War II. He was also a recipient of the Knight's Cross of the Iron Cross, awarded by Nazi Germany to recognise extreme battlefield bravery or successful military leadership.
Stumpff joined the Imperial German Army as an officer cadet in 1907. He was awarded the Iron Cross first and second class in World War I. He was then retained in the Reichswehr in which he was promoted to Oberstleutnant in September 1933 and Oberst on 1 July 1935.
On 1 January 1938 he was given command of the 3rd Panzer Brigade and on 1 March 1939 he was promoted to Generalmajor and led the brigade during the invasion of Poland. On 7 October 1939 he was appointed commander of the 3rd Panzer Division and in November 1940 he was given command of the new 20th Panzer Division and promoted to Generalleutnant on 1 February 1941. He led the division on the Eastern Front and on 29 September 1941 he was awarded the Knight's Cross of the Iron Cross, but he was moved the leadership reserve shortly afterwards.
In April 1942 Stumpff was appointed as the military inspector of the recruiting area Königsberg. In July 1944 he became the Inspector General of the Panzer troops in the replacement army and he was promoted to General der Panzertruppe in 1944. He died in Hamburg aged 71.
- Knight's Cross of the Iron Cross on 29 September 1941 as Generalleutnant and commander of the 20. Panzer-Division
- Fellgiebel 2000, p. 417.