Ath (; ,
Picard:
Ât) is a
Belgian municipality located in the
Walloon province of
Hainaut. The Ath
municipality includes the old communes of Lanquesaint, Irchonwelz,
Ormeignies, Bouvignies, Ostiches, Rebaix, Maffle, Arbre, Houtaing, Ligne, Mainvault, Moulbaix, Villers-Notre-Dame, Villers-Saint-Amand,
Ghislenghien , Isières, Meslin-l'Evêque, and Gibecq.