Cormatin (French pronunciation: [kɔʁmatɛ̃]) 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.

The Grosne forms part of the commune's south-western border, then flows northward through the western part of the commune.

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