István Molnár
István Molnár is the name of the following people:
- István Molnár (water polo player) (1913–1983), Hungarian water polo player
- István Molnár (volleyball player) (1937–1999), Hungarian volleyball player
- István Molnár (cyclist) (* 1980), Hungarian cyclist
- István Molnár (table tennis player) (* 1999), Hungarian table tennis player
