Karl Reetz
German Army Major ; affiant in Hostages Trial
- Born: 1911-11-11 (Lüneburg)
- Occupation: soldier
- Participant in: Hostages Trial (date: 1947-07-13; role: affiant)
- Significant person: Ernst von Leyser (role: superior)
- Military branch: German Army (military rank: commanding officer; military unit: 269th Infantry Division (Wehrmacht); period: 1940-05-20 through 1945-03-31)
- Residence: Lüneburg (date: 1947-07-13)