Sergey Bolshakov

Sergey Bolshakov (born 6 June 1988) is a Russian professional swimmer, specialising in Open water swimming. He won the bronze medal in the 10 km open water marathon at the 2011 World Championships. He competed at the 2012 Summer Olympics.

He took up swimming at the age of nine in his home town, after being encouraged to do so by his mother, who was also a swimmer. He competes for the Central Army Sports Club (CSKA). Since 2010, his coach has been Elena Nurgaleyeva. He made his international debut for Russia in 2007.