Josef Kollmer (26 February 1901 – 28 January 1948) was a German SS functionary during the Nazi era who committed mass murder at Auschwitz. He was prosecuted at the Auschwitz Trial. Born in , Bavaria, Kollmer was a farmer by trade. He became a member of the SS on January 1, 1935 after having previously spent several years in the German police force. He joined the Nazi party in May 1937. In October 1941 he was drafted into the Waffen-SS and was assigned to Auschwitz, where he commanded various guard companies until October 1943. He then temporarily transferred to Mittelbau-Dora concentration camp, but returned to Auschwitz in May 1944. Initially he commanded the guard company at Auschwitz main camp, then later the one at Monowitz concentration camp from August to October 1944. During his tim