Théodore Chevignard de Chavigny, comte de Toulongeon

Théodore Chevignard de Chavigny, comte de Toulongeon (born 1687; died 1771) was a French aristocrat and diplomat.

The eldest son of Théodore Chevignard de Chavigny, Procurer-Royal and Mayor of Beaune, he was posted as French Ambassador to London in 1731, later serving in Copenhagen (1737–39) and Lisbon (1740-43). As Ambassador to Munich and Frankfurt from 1745 until 1746, he was a key player in French negotiations during the War of the Austrian Succession.

In 1746 King Louis XV posted him again as Ambassador to Portugal where served until 1749, before Venice and Switzerland between 1751 and 1762.