The Communauté d'agglomération de la Porte du Hainaut is an intercommunal structure in the Nord department, in the Hauts-de-France region, northern France. It was created in January 2014. Its seat is in Wallers. Its largest towns are Denain and Saint-Amand-les-Eaux. Its area is 371.4 km2. Its population was 158,754 in 2017.