Ralph L. Klassen (September 15, 1955 – August 3, 2020) was a Canadian professional ice hockey player. He played 497 games in the National Hockey League.
In Klassen's ten-year career, he played for the California Golden Seals, Cleveland Barons, Colorado Rockies, and St. Louis Blues. He was born in Humboldt, Saskatchewan.
Klassen died on August 3, 2020 at the age of 64.