基督教以这种或那种形式，是以下国家的唯一国家宗教：阿根廷（天主教），图瓦卢（改革宗），汤加（卫理公会），挪威（路德），哥斯达黎加（天主教），丹麦王国（路德教会） ，英格兰（英国国教），格鲁吉亚（格鲁吉亚东正教），希腊（希腊东正教），冰岛（路德），列支敦士登（天主教），马耳他（天主教），摩纳哥（天主教）和梵蒂冈（天主教）。

Christianity, in one form or another, is the sole state religion of the following nations: Argentina (Catholic),Tuvalu (Reformed), Tonga (Methodist), Norway (Lutheran),Costa Rica (Catholic),Kingdom of Denmark (Lutheran),England (Anglican),Georgia (Georgian Orthodox),Greece (Greek Orthodox),Iceland (Lutheran),Liechtenstein (Catholic),Malta (Catholic),Monaco (Catholic),and Vatican City (Catholic).


https://en.m.wikipedia.org/wiki/List_of_Christian_denominations

https://en.m.wikipedia.org/wiki/Catholic_Church

天主教会由主教领导的教会组成，与罗马主教教皇交往，作为其在信仰，道德和教会治理方面的最高权威。

The Catholic Church consists of those particular Churches, headed by bishops, in communion with the Pope, the Bishop of Rome, as its highest authority in matters of faith, morality and Church governance.

 

https://en.m.wikipedia.org/wiki/Eastern_Orthodox_Church

与天主教会一样，东正教会也通过使徒继承将其遗产追溯到基督教的基础，并具有主教结构，虽然强调其组成部分的自治，其中大多数是国家教会。

Like the Catholic Church, the Eastern Orthodox Church also traces its heritage to the foundation of Christianity through apostolic succession and has an episcopal structure, though the autonomy of its component parts is emphasized, and most of them are national churches.