Vladimir Fyodorovich Dyatchin () (born 14 October 1982, in Lipetsk) is a Russian long-distance swimmer. He won the 10 km open water at the 2007 World Aquatics Championships despite suffering 10-inch long lacerations on both of sides of his rib cage, caused by a jellyfish sting.
In 2007 he was voted as Swimming World's Open Water Swimmer of the Year.