Robert Martin Johnson (born November 12, 1948 in Farmington, Michigan) is a retired professional ice hockey goaltender who played 24 games in the National Hockey League. He played with the Pittsburgh Penguins and St. Louis Blues. His son is Penguins goaltender Brent Johnson. He played for Michigan State University from 1967 to 1970 and then for the junior Kenora Muskies in 1970-71. That same season he turned pro with the Toledo Hornets. He retired in 1977.