Ath is a city and municipality of Wallonia located in the province of Hainaut, Belgium. The municipality consists of the following districts: Arbre, Ath, Bouvignies, Ghislenghien, Gibecq, Houtaing, Irchonwelz, Isières, Lanquesaint, Ligne, Maffle, Mainvault, Meslin-l'Évêque, Moulbaix, Ormeignies, Ostiches, Rebaix, Villers-Notre-Dame, and Villers-Saint-Amand.