Hermann Opdenhoff (9 January 1915 in Falkenberg – 21 March 1945 in the lock at Den Helder) was a German Schnellboot commander in World War II and recipient of the Knight's Cross of the Iron Cross (German: Ritterkreuz des Eisernen Kreuzes). The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership.