Siegfried Simsch (6 September 1913 – 8 June 1944) was a German Luftwaffe ace and recipient of the Knight's Cross of the Iron Cross during World War II. The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. Siegfried Simsch was killed on 8 June 1944 over Rennes, France. During his career he was credited with 54 aerial victories.