The Gehlen Organization or Gehlen Org was an intelligence agency established in June 1946 by U.S. occupation authorities in the United States zone of post-war occupied Germany, and consisted of former members of the 12th Department of the German Army General Staff. It was headed by Reinhard Gehlen who had previously been a Wehrmacht Major General and head of the Nazi German military intelligence in the Eastern Front during World War II.

Reinhard Gehlen was a German career intelligence officer who served the Weimar Republic, Nazi Germany, the U.S. intelligence community, and the NATO-affiliated Federal Republic of Germany during the Cold War.