John "Uncle" Homer Walker (February 15, 1898 or c. 1904 – January 4, 1980) was an American Appalachian banjo player who was popular during the folk revival of the 1960s and 1970s. Prior to his death, he was one of the last musicians to practice the old-time Appalachian style. He died in Princeton, West Virginia. Walker's recordings are featured on the compilation albums Virginia Traditions - Non-Blues Secular Black Music and Black Banjo Songsters of North Carolina and Virginia.