Dr. rer. pol. Dr.-Ing. Johannes Mayer (6 September 1893 – 7 August 1963) was a German General of the Infantry, serving during World War II. He was also a recipient of the Knight's Cross of the Iron Cross with Oak Leaves and Swords (). The Knight's Cross of the Iron Cross and its higher grade Oak Leaves and Swords was awarded to recognise extreme battlefield bravery or successful military leadership.