| János Zemen | |
| Nationality: | Hungarian |
| Birth Date: | 29 August 1950 |
| Height: | 173 cm |
| Weight: | 65 kg |
János Zemen is a Hungarian Olympic middle-distance runner. He represented his country in the men's 1500 meters at the 1976 Summer Olympics. His time was a 3:44.27 in the first heat, a 3:39.94 in the semifinals, and a 3:43.02 in the finals. He also competed in the men's 800 metres, posting a time of 1:47.40 in the heats.[1]