According to the 2001 Survey and Study of Religion,[23] about 47 percent of the Belgian population identify themselves as belonging to the Catholic Church, while Islam is the second-largest religion at 3.5 percent.
Manuruik kajian taun 2010 sarato kalua pado bulan Januari 2011,[1][2] agamo Islam punyo 1.57 panduduak nan maanuik agamo iko, labiah dari 23% dari jumalah urang-urang di dunia.[3][4][5]