Oflag IX-A was a World War II German prisoner-of-war camp located in Spangenberg Castle in the small town of Spangenberg in northeastern Hesse, Germany.

The camp was opened in October 1939 as Oflag IX-A[1] to house POWs from the British Royal Air Force and the French Armée de l'Air.[2] The camp was renamed Oflag IX-A/H (Hauptlager, "Main camp") in June 1940,[1] after Oflag IX-C at Rotenburg an der Fulda became a sub-camp (Zweiglager) designated Oflag IX-A/Z.