Cormatin () is a commune in the Saône-et-Loire department in the region of Bourgogne-Franche-Comté in eastern France. The village, on the river Grosne, is home to a castle. Geography The Grosne forms part of the commune's south-western border, then flows northward through the western part of the commune. See also Communes of the Saône-et-Loire department References Communes of Saône-et-Loire