Bernhard Siebken (4 April 1910 – 20 January 1949) was a German SS commander during World War II and a convicted war criminal. He was sentenced to death for the killing of Canadian prisoners of war and was executed in 1949. After the end of the war, he stood trial for war crimes related to his activities while in command of the 2nd Battalion, 26th Panzer Grenadier Regiment of the LSSAH. He was found guilty in the shootings of Canadian prisoners of war from the Queen's Own Rifles during the Battle of Le Mesnil-Patry and hanged on 20 January 1949.