Szilveszter Csollány (Hungarian: ['silv?st?r 't??olla??]; born 13 April 1970 in Sopron, Hungary) is a former gymnast from Hungary.
He won gold in the men's rings at the 2000 Summer Olympics in Sydney with a score of 9.85.
This achievement earned him the title 2000 Hungarian Sportsman of The Year.
He was once again chosen as sportsman of the year in 2002 after winning a gold medal at that year's World Artistic Gymnastics Championships.
He moved to Iceland in 2011 and became a gymnastics coach at Grótta.