Milan Horyna (born January 9, 1939 in Hradec Králové) is a Czechoslovak retired slalom canoeist who competed from the late 1950s to the early 1970s. He won a four medals at the ICF Canoe Slalom World Championships with three silvers (C-2: 1967; C-2 team: 1967, 1959) and a bronze (C-2 team: 1971).