Châtillon (French diminutive formed from châtel, i.e. castle) is a common place name in French-speaking countires, and may refer to:
It is the name of several places:

Châtillon (family), e.g. Hugh I of Châtillon
Battle of Châtillon during the Siege of Paris in the Franco-Prussian War (1870/1871)
In Belgium

• Châtillon, Belgium, in the province of Luxembourg
  In Italy
  
  
  
  • Châtillon, Italy, in the Aosta Valley
    In Switzerland
    
    
    
    • Châtillon, Fribourg, in the Canton of Fribourg
      Châtillon, Jura, Switzerland, in the Canton of Jura
      Châtillon, Berne, part of the municipality of Prêles in the Canton of Berne
      In France
      
      
      
      • Châtillon, Allier, in the Allier département
        Châtillon, Jura, France, in the Jura département
        Châtillon, Rhône, in the Rhône département
        Châtillon, Vienne, in the Vienne département
        Châtillon, Hauts-de-Seine, in the Hauts-de-Seine département