Juan Manuel Sánchez de Castro (born 18 April 1965) is a Spanish sprint canoer who competed from the late 1980s to the mid-1990s. He won a complete set of medals at the ICF Canoe Sprint World Championships with a gold (K-2 500 m: 1991), a silver (K-2 1000 m: 1991), and a bronze (K-2 500 m: 1993).