Szilvia Mednyánszky (born January 2, 1971 in Győr) is a Hungarian sprint canoer who competed in the mid-1990s. She won five medals at the ICF Canoe Sprint World Championships with a gold (K-4 200 m: 1994), three silvers (K-2 500 m: 1993, 1994; K-4 500 m: 1994) and a bronze (K-4 500 m: 1995).