Sergey Kalesnik (born January 28, 1970 in Gomel, Byelorussian SSR) is a Soviet-born Belarusian sprint canoeist who competed from the late 1980s to the late 1990s. He won six medals at the ICF Canoe Sprint World Championships with three golds (K-1 200 m: 1994, K-1 500 m: 1990, K-2 500 m: 1990) and three silvers (K-1 200 m: 1995, K-2 500 m: 1989, K-4 1000 m: 1990).