Griff Barnett (November 12, 1884 – January 12, 1958) was an American actor.
Barnett was born Manley Griffith in Blue Ridge, Texas in 1884. He played the role of the Rexall family druggist in commercials on The Phil Harris-Alice Faye Show on radio in the late 1940s and early 1950s. He also appeared in numerous films from the 1930s through the 1950s, including To Each His Own (1946), Apartment for Peggy (1948), and Pinky (1949). He frequently played doctors or lawyers. In 1954, he appeared in episode 131 of the TV Series, The Lone Ranger.
He died at home in El Monte, California on January 12, 1958 aged 73, survived by his wife Lara, two children, and three grandchildren.