Christianity, in particular Roman Catholicism, is the largest religion in Belgium. According to Eurobarometer, as of 2012 about 65% of the population is Christian, with 58% being members of the Roman Catholic Church. Members of Protestant, Eastern Orthodox churches and other Christian denominations make up 7% of the population.
The second-largest religion in Belgium is Islam, which accounts for 5% of the population as of 2009.
Belgium's policy asserts the separation of church and state, and freedom of religion of the citizens is guaranteed by the country's constitution.
According to a 2010 Eurobarometer poll:
Some religious people dispute the precise figures, as it is unclear how many Belgians who say they believe in God are actually Christians and how many who call themselves Christians, but refuse the label "Catholic," have severed all links to the Roman Catholic Church. Also in dispute are how many Catholic Belgians have become deists or have joined small Protestant churches.
Religion in Belgium (Eurobarometer 2012)
The Belgian constitution provides for freedom of religion, and the government generally respects this right in practice. However, government officials have the authority to research and monitor religious groups that are not officially recognized. There are a few reports of societal abuses or discrimination based on religious belief or practice, and some reports of discrimination against minority religious groups.
Belgian law officially recognizes many religions, including Catholicism, Protestantism, Anglicanism, Islam, Judaism, and Eastern Orthodoxy, as well as non-religious philosophical organizations (Dutch: vrijzinnige levensbeschouwelijke organisaties; French: organisations laïques).Buddhism is in the process of being recognized under the secular organization standard. Official recognition means that priests (called "counsellors" within the secular organizations) receive a state stipend. Also, parents can choose any recognized denomination to provide religious education to their children if they attend a state school. Adherents to religions that are not officially recognized are not denied the right to practice their religion, but do not receive state stipends.