Cities & towns starting with o in Belgium

• Ohain (Walloon Brabant)
• Oignies (Namur Region)
• Oignies En Thierarche (Namur Region)
• Oostduinkerke (West Flanders)
• Oostkamp (West Flanders)
• Opglabbeek (Limburg Region)
• Ophain (Walloon Brabant)
• Opoeteren (Limburg Region)
• Ostend (West Flanders)
• Oud (Antwerp Region)
• Oud Turnhout (Antwerp Region)
• Oudenaarde (East Flanders)
• Overijse (Flemish Brabant)