Hans Engelien (30 May 1913 – 9 May 1945) was a highly decorated Oberstleutnant in the Wehrmacht during World War II, and one of only 882 recipients of the Knight's Cross of the Iron Cross with Oak Leaves. The Knight's Cross of the Iron Cross and its higher grade Oak Leaves was awarded to recognise extreme battlefield bravery or successful military leadership. Hans Engelien was listed as missing in action as of 9 May 1945.