Walter B. McGrail (October 19, 1888 – March 19, 1970) was an American film actor. He appeared in more than 150 films between 1916 and 1951. He was born in Brooklyn, New York and died in San Francisco, California, at the age of 81.

Selected filmography

• Lights of New York (1916)
• The Scarlet Runner (1916)
• The Triumph of the Weak (1918)
• Brown of Harvard (1918)
• The Black Secret (1919)
• The Invisible Divorce (1920)
• Habit (1921)
• The Top of New York (1922)
• The Kentucky Derby (1922)
• Is Divorce a Failure? (1923)
• Where the North Begins (1923)
• Unguarded Women (1924)
• The Teaser (1925)
• American Beauty (1927)
• Old San Francisco (1927)
• Blockade (1928)
• Hey Rube! (1928)
• Men Without Women (1930)
• Women Everywhere (1930)
• The Last of the Duanes (1930)
• Seas Beneath (1931)
• Murder by the Clock (1931)
• Night Beat (1931)
• The Last of the Mohicans (1932)
• McKenna of the Mounted (1932)
• State Trooper (1933)
• The World Moves On (1934)
• Ten Laps to Go (1936)
• In Old Montana (1939)
• Mysterious Doctor Satan (1940)