Andrey Vladimirovich Grechin (, born 21 October 1987) is a Russian swimmer. He competed in the 50 m, 100 m and 4 à100 m freestyle and 4 à100 m medley events at the 2008 and 2012 Olympics and won a bronze medal in the 4 à100 m freestyle relay in 2012. He won three more medals in this event at the world championships in 2009âÂÂ2015.