Ștefan Tașnadi (Hungarian: István Tasnádi, 21 March 1953 – 28 February 2018) was a Romanian heavyweight weightlifter. He won a silver medal at the 1984 Olympics. He was born in Cluj, Romania. Tașnadi took up lifting in 1970 at a sports school and from 1976 to 1984 was a member of the national team. He retired in 1984 to become a weightlifting coach.