National Religion: Roman Catholic
El Salvador
National Religion: Roman Catholic
Germany
National Religion: Roman Catholic
Liechtenstein
National Religion: Roman Catholic
Malta
National Religion: Roman Catholic
Monaco
National Religion: Roman Catholic
Slovakia
National Religion: Roman Catholic
Cantons of Switzerland
National Religion: Roman Catholic
Vatican City
National Religion: Roman Catholic
Cyprus
National Religion: Eastern Orthodox
Moldova
National Religion: Eastern Orthodox
Greece
National Religion: Eastern Orthodox
Finland
National Religion: Eastern Orthodox
Russia
National Religion: Eastern Orthodox Lutheran
Germany
National Religion: Lutheran
Denmark
National Religion: Lutheran
Iceland
National Religion: Lutheran
Norway
National Religion: Lutheran
Finland
National Religion: Lutheran
England
National Religion: Anglican
Scotland
National Religion: Reformed
Switzerland
National Religion: Reformed
Some cantons of Switzerland
National Religion: Old Catholic
Afghanistan
National Religion: Islam
Algeria (Sunni)
National Religion: Islam
Bahrain
National Religion: Islam
Bangladesh
National Religion: Islam
Brunei
National Religion: Islam
Comoros (Sunni)
National Religion: Islam
Egypt
National Religion: Islam
Iran (Shi'a)
National Religion: Islam
Iraq
National Religion: Islam
Jordan (Sunni)
National Religion: Islam
Kuwait
National Religion: Islam
Libya
National Religion: Islam
Malaysia (Sunni)
National Religion: Islam
The Maldives, Mauritania (Sunni)
National Religion: Islam
Morocco
National Religion: Islam
Oman
National Religion: Islam
Pakistan (Sunni)
National Religion: Islam
Qatar
National Religion: Islam
Saudi Arabia
National Religion: Islam
Somalia (Sunni)
National Religion: Islam
Tunisia
National Religion: Islam
United Arab Emirates
National Religion: Islam
Yemen
National Religion: Islam
Russia
National Religion: Islam
Israel
National Religion: Judaism
Russia
National Religion: Judaism
Bhutan
National Religion: Buddhism
Cambodia
National Religion: Buddhism
Russia Kalmykia
National Religion: Buddhism
Sri Lanka
National Religion: Buddhism
Thailand
National Religion: Buddhism
There are also many countries that claim no national or state religion. Countries like the US also support and maintain the right to religious freedom. That simply means that people and citizens of the US are free to choose any religion they wish to follow.
Religion has been the backbone of many countries, and it has been the impetus behind many backs being broken too. There are also some places and some countries where certain religions are not only unsupported but forbidden. In some of those states, certain religions are even deemed illegal or outside the law.
There are also many much smaller sects and religious groups that aren't listed, but that have organized structures. In some countries like Russia too, there is more than one recognized national religion. Russia, for example, has at least three.