Charles Mannay (October 14, 1745 – December 5, 1824) was a French Roman Catholic Church theologian and bishop, serving in the dioceses of Trier, Auxerre, and Rennes during the late 18th and early 19th centuries.

A man of great compassion, he worked to alleviate the suffering of local residents following the devastating tornado of August 13, 1788, which caused severe damage from Bordeaux to the Low Countries.

[2] While the Pope was held in France, he led an ecclesiastical council in Paris, helping pressure Pius VII to agree with the Concordat of Fontainebleau in 1811.

King Louis XVIII nominated him as Bishop of Auxerre in 1817, but as the diocese had not yet been reestablished, Mannay could not assume the role.

Letters patent dated November 22, 1808, granted Charles Mannay the following arms: "Quartered: first and fourth argent with three sable bars; second gules with a gold cross; third azure with a rampant lion or.