János Greminger

János Greminger (5 May 1929 – 20 October 2009) was a Hungarian basketball player who competed in the 1952 Summer Olympics. He was born in Szeged.
He was part of the Hungarian basketball team, which was eliminated after the group stage of the 1952 tournament. He played all six matches. He was also part of the Hungarian basketball team in the 1960 Summer Olympics in Rome where Hungary was the 9th and 1964 Summer Olympics in Tokyo, his team was the 13th there.