Yury Valentinovich Kovalchuk (born 25 July 1951) is a Russian billionaire businessman and financier who is "reputed to be Vladimir Putin's personal banker".

Throughout the 1990s Yuri Kovalchuck was a good friend of Vladimir Putin, who was then deputy mayor of St. Petersburg. They both had country houses in the Ozero dacha cooperative, and when Putin became president of Russia, many of the cooperative's members' careers improved. After US sanctions against Rossiya Bank, Putin opened salary account in his bank. According to media reports, Putin's daughter Katerina Tikhonova got married at Kovalchuk's ski resort in 2013.

The May 2008 issue of Russian Forbes listed him for the first time in its Golden Hundred of Russia's richest, calling him and another new entrant to the List, Gennady Timchenko, "good acquaintances of Vladimir Putin." The magazine placed him at number 53 on the Russians-only list, with an estimated fortune of $1.9 billion.