| Birth Date: | 17 April 1904 |
| Birth Place: | Nuremberg, German Empire |
| Death Place: | Ansbach, West Germany |
| Sport: | Water polo |
Johann Blank (April 17, 1904 – March 15, 1983) was a German water polo player who competed in the 1928 Summer Olympics.
He was part of the German team which won the gold medal. He played one match as goalkeeper.