Sergey Perunin (; born 19 July 1988) is a Russian swimmer who won a silver medal in the 4 ÃÂ 200 m freestyle relay at the 2009 World Aquatics Championships. Next year he won a gold medal in the same event at the 2010 European Aquatics Championships setting a new European record.
In August 2012 he married Larisa Ilchenko, multiple open water swimming champion.