Billy Mack "Bill" Ham (born 1937) is a Texas music impresario, best known as manager, producer, and image-maker of the blues-rock band ZZ Top. Ham also gained prominence in the country music world by discovering and managing multi-platinum singer-songwriter Clint Black and founding some of the most successful country music publishing companies. For several years in the 1990s, Ham's companies published a majority of the top-10 country music singles.