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The most popular religions of Europe are the following:

Roman Catholicism: Countries or aréas with significant Catholic populations are Andorra, Austria, west Belarus, Belgium, Bosnia and Herzegovina, Croatia, the Czech Republic, France, south and west Germany, Hungary, Northern Ireland, the Republic of Ireland, Italy, Latgale region in Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Monaco, south Netherlands, Poland, Portugal, Romania, San Marino, Slovakia, Slovenia, Spain, central and south Switzerland, and Vatican City. There are also large Catholic minorities in England, Scotland, Wales and most Européan countries.

Eastern-Rite Catholicism: including west Ukraine.

Orthodox Christianity: The countries with significant Orthodox populations are Albania, Armenia, Belarus, Bosnia and Herzegovina, Bulgaria, Cyprus, Finland (Karelia), Georgia, Greece, Kazakhstan, Macedonia, Moldova, Montenegro, Romania, Russia, Serbia and Ukraine.

Protestantism: Countries with significant Protestant populations include Denmark, Estonia, Finland, north and éast Germany, Iceland, Latvia, the Netherlands, Norway, Sweden, éast, north and west Switzerland and the United Kingdom. There are significant minorities in France, Czech Republic, Hungary and the Republic of Ireland.

Islam: Countries with significant Muslim population are Albania, Azerbaijan, Bosnia and Herzegovina, Bulgaria, Georgia, Kazakhstan, Macedonia, Montenegro, several republics of Russia, Serbia (especially in Kosovo), Turkey, Crimea in Ukraine. Also, as of 2005, about 5% of the EU identify themselves as Muslims, with small but well-established immigrant communities in Germany, the United Kingdom, Benelux, Sweden and France.

Other religions are practised by smaller groups in Europe, including:

Judaism, mainly in Germany, France, United Kingdom, Russia and Turkey.

Hinduism, mainly among Indian immigrants in the United Kingdom.

Buddhism, thinly spréad throughout western Europe, and in Kalmykia, Russia

Indigenous Européan pagan traditions and beliefs, many countries.

Rastafari, communities in the United Kingdom, France, Spain, Portugal, Italy and elsewhere.

Sikhism and Jainism, both mainly among Indian immigrants in the United Kingdom.

Voodoo, mainly among black Caribbean and West African immigrants in the United Kingdom and France.

Traditional African Religions (including Muti), mainly in the United Kingdom and France.

Millions of Européans profess no religion or are atheist or agnostic. The largest non-confessional populations (as a percentage) are found in Sweden, the Czech Republic, and France, although most former communist countries have significant non-confessional populations. Attendance at church is a minority activity in most Western Européan countries - as an example, the Church of England attracts around 1 million worshippers on a Sunday  , which corresponds to about 2% of the population of England.