Michael John "Duke" Robillard (born October 4, 1948, Woonsocket, Rhode Island) is an American blues musician.
After playing in various bands and working for the Guild Guitar Company, he co-founded the band Roomful of Blues with pianist Al Copley in 1967. He has also been a member of The Fabulous Thunderbirds which included Kim Wilson, replacing Jimmie Vaughan on guitar. Also experienced in jazz, swing, and rock and roll, aside from his preferred blues music, Robillard has been generally regarded as a guitar player keeping the blues style of T-Bone Walker.
He has recorded with artists such as Jimmy Witherspoon, Snooky Prior, Jay McShann, Hal Singer, Pinetop Perkins, Joe Louis Walker, Todd Sharpville, Tom Waits and Bob Dylan. In the summer of 2006, Robillard accompanied Tom Waits on a tour of the Southern United States.