Aleksey Viktorovich Markovsky is a retired Russian swimmer who won a silver medal in the 4 × 100 m medley relay at the 1980 Summer Olympics; he finished eighth in the 100 m butterfly event at the same Olympics. After the games, between 1981 and 1986 he won ten medals at the World and European Championships, mostly in relay events. He missed the 1984 Summer Olympics that were boycotted by the Soviet Union, and took part in the Friendship Games instead.