Igor Vladimirovich Zyuzin (born May 29, 1960) is a Russian businessman, Chairman of the Board of Directors and a major shareholder of the mining and steel group "Mechel". With a personal fortune of US$ 8.9 billion, he was at number 16 on the Forbes list of 200 richest Russian business people. He lost most of his net worth to a record drop in the Mechel stock price by late 2013.

In 1995 Igor Zyuzin and partner Vladimir Iorich formed Uglemetkooperatsiya, a coal-trading company, which was among the first to buy up shares in coal mines and pits in Russia's Kuzbass region. In 2001 the partners bought a controlling stake in Chelyabinsk Metals Factory, which formed the basis of the Mechel Group, which now has more than 20 plants and coals mines around the world. Three years later its shares began trading on the New York Stock Exchange. Now Mechel is in the doldrums. In the first nine months of 2012 the company lost $550 million and racked up $9.1 billion in debt. In September 2012 Mechel announced it was selling assets including factories in Romania, a Lithuanian wire, nails and wire mesh maker called Mechel Namunas, and nicked producer Yuzhuralnickel.