Sady D. Courville (November 15, 1905 – January 3, 1988), was a Cajun fiddler noted for his extensive collaboration with Dennis McGee.
Courville was born in Chataignier, Louisiana, the son of Eraste Courville who was also a fiddler. In his early teens he bought his first fiddle and started learning from his father and Dennis McGee. By the time he was 16, he was playing dances with Amédé Ardoin around Chataignier and Faiquitaique.meer