Albrecht Mertz von Quirnheim was a German Army colonel and a resistance fighter in Nazi Germany involved in the 20 July plot against Adolf Hitler.

The 20 July plot was a failed attempt to assassinate Adolf Hitler, the chancellor and leader of Nazi Germany, and subsequently to overthrow the Nazi regime on 20 July 1944. The plotters were part of the German resistance, mainly composed of Wehrmacht officers. The leader of the conspiracy, Claus von Stauffenberg, planned to kill Hitler by detonating an explosive hidden in a briefcase. However, due to the location of the bomb at the time of detonation, the blast only dealt Hitler minor injuries. The planners' subsequent coup attempt also failed and resulted in a purge of the Wehrmacht.