Belgium is a town in Ozaukee County, Wisconsin, United States. The population was 1,513 at the 2000 census. The Village of Belgium is surrounded on all sides by the town, and the unincorporated communities of Decker, Holy Cross, Lake Church, and Sauk Trail Beach are located in the town, as is the ghost town of Stonehaven. The unincorporated community of Dacada is also partially located in the town.