| Birth Date: | 17 July 1913 |
| Birth Place: | Marosvásárhely, Kingdom of Romania |
| Death Place: | Copenhagen, Denmark |
| Sport: | Water polo |
Kálmán Hazai (17 July 1913 - 21 December 1996) was a Hungarian water polo player who competed in the 1936 Summer Olympics. He was born in Marosvásárhely.
He was part of the Hungarian team which won the gold medal. He played five matches including the final. He died in Copenhagen, Denmark.