the son of Gaucher IV de Châtillon and Isabelle de Villehardouin, and was the grandson of Hugues de Châtillon, Count of Blois and Saint-Pol.

In 1284, King Philip III of France named Gaucher, Constable of Champagne. He traded Philip IV for the county of Chatillon in return for Crecy in 1290, however in 1303 Philip forced the return of the county in exchange