Jean-Charles Gravier, Marquis of Vergennes[1] and Baron of Tenare, was a French aristocrat, magistrate and diplomat.

Born in Dijon in 1718, the eldest son of Charles Gravier, Lord of Vergennes, he became a chief counselor in the Court of Auditors of Burgundy in 1738 and then President of the Court in 1742.

As ambassador, he renewed the treaty of alliance between France and the Swiss cantons on 28 May 1777, in Solothurn.

[citation needed] Imprisoned in the Saint-Lazare Prison during the French Revolution, he was guillotined alongside his eldest son Charles Gravier de Vergennes on 24 July 1794, in Paris.

[citation needed] Jean Gravier married to Jeanne Chevignard de Chavigny from a noble Burgundian family related to the Graviers, daughter of Philibert Chevignard de Chavigny, President of the Parliament of Besançon and niece of the ambassador Théodore Chevignard de Chavigny, Count of Toulongeon.