Byman is a surname. Notable people with the surname include:
Bob Byman (born 1955), American golfer Daniel Byman (born 1967), American political scientist Isabelle Yalkovsky Byman (1906–1981), American pianist and music educator Lennart Byman (1875–1947), Finnish Lutheran clergyman and politician Reijo Byman (born 1955), Finnish hurdler