Holzminden prisoner-of-war camp was a World War I prisoner-of-war camp for British and British Empire officers (Offizier Gefangenenlager) located in Holzminden, Lower Saxony, Germany. It opened in September 1917, and closed with the final repatriation of prisoners in December 1918. It is remembered as the location of the largest PoW escape of the war, in July 1918: 29 officers escaped through a tunnel, of whom ten evaded subsequent recapture and managed to make their way back to Britain.