French diplomat.

President of the Burgundy chambre des comptes (1742). French ambassador to Switzerland (1777-89), Portugal (1777), and Venice (1778-84).

Son of Charles, seigneur de Vergennes, and Marie-François (Chevignard) Gravier de Vergennes; brother of Charles Gravier, comte de Vergennes. Married Jeanne-Claude Chevignard de Chavigny; two sons and two illegitimate daughters.