The House of Châtillon was a notable French family, with origins in the 9th century and surviving until 1762. The name comes from a county in Champagne, with its capital in Châtillon-sur-Marne and branches in Saint-Pol-sur-Ternoise, Blois, Penthièvre (title later seized by and reverted to the Dukes of Brittany at various times), Chartres, etc. The Châtillon-sur-Marne branch melt since 1659 with the Wolbock family.
The counts of Châtillon added to their title that of prince of Porcien. Significant members of the house include:
This house is totally distinct from the house of Châtillon-sur-Loing, which produced (among others) the Coligny brothers : Gaspard, François and cardinal Odet.