Buddhism is not officially recognized as a religion in Slovakia. As of January 2021, Buddhists numbered 6,722 or 0.12% of the population.
Orthodox Christianity is the most widely professed religion in Russia, with significant minorities of non-religious people and adherents of other faiths.
The majority of Vietnamese do not follow any organized religion, instead participating in one or more practices of folk religions, such as venerating ancestors, or praying to deities, especially during Tết and other festivals. Folk religions were founded on endemic cultural beliefs that were historically affected by Confucianism and Taoism from ancient China, as well as by various strands of Buddhism. These three teachings or tam giáo were later joined by Christianity which has become a significant presence. Vietnam is also home of two indigenous religions: syncretic Caodaism and quasi-Buddhist Hoahaoism.
Serbia has been a predominantly Christian country since the Christianization of Serbs by Clement of Ohrid and Saint Naum in the 9th century. The dominant confession is Eastern Orthodoxy in the fold of Serbian Orthodox Church.
Religion in Bulgaria has been dominated by Christianity since its adoption as the state religion in 864. The dominant form of the religion is Eastern Orthodox Christianity within the fold of the Bulgarian Orthodox Church. During the Ottoman rule of the Balkans, Islam spread to the territories of Bulgaria, and it remains a significant minority today. The Catholic Church has roots in the country since the Middle Ages, and Protestantism arrived in the 19th century; both of them remain very small minorities. Today, a significant part of the Bulgarians are not religious, or believers who do not identify with any specific religion, and Bulgaria has been the cradle of some new religions, notably the Neo-Theosophical movement of Dunovism.
Christianity is the predominant religion in Uganda. According to the 2024 census, Approximately 82 percent of the population was Christian, while around 13 percent of the population adhered to Islam, making it the largest minority religion. Anglicanism and Catholicism are the main Christian denominations in the country.
Christianity is the main religion in Romania, with Romanian Orthodoxy being its largest denomination.
Christianity is the predominant religion in Ukraine, with 85% of the population identifying as Christian according to a 2022 survey conducted by the Kyiv International Institute of Sociology (KIIS). Seventy-two percent of the population avowed fidelity to an Eastern Orthodox Church: 54% of Ukrainians proclaimed adherence to the autocephalous Orthodox Church of Ukraine; 14% identified as Orthodox Christian without specifying a church affiliation; 4% associated with the Moscow Patriarchate. Another 9% of Ukrainians professed devotion to the Catholic Church in Ukraine: 8% Ukrainian Greek Catholics and 1% Latin Catholics. Two percent of the population declared affiliation to a mainstream Protestant Church, and a further 2% identified with some alternative sect of Christianity.
Christianity is the main religion in Belarus, with Eastern Orthodoxy being the largest denomination. The legacy of the state atheism of the Soviet era is apparent in the fact that a proportion of Belarusians are not religious. Moreover, other non-traditional and new religions have sprung up in the country after the end of the Soviet Union.
Christianity is the largest religion in Mozambique, with substantial minorities of the adherents of traditional faiths and Islam.
Christianity has been the main religion in the Marshall Islands ever since it was introduced by European missionaries in the 19th century.
Christianity is the largest religion in Nauru, with Nauru Congregational Church being the largest denomination, encompassing 35.71% of the population as of the 2011 census.
Christianity is the predominant religion in Tuvalu, with Calvinism being the single largest denomination.
In the Czech Republic, 47.8% of population is irreligious, while 21.3% of the population are believers. The religious identity of the country has changed drastically since the first half of the 20th century, when more than 90% of Czechs were Christians. As of 2021, 11.7% of the population identified with Christianity ; 10.8% identified with other religious identities or beliefs. According to sociologist Jan Spousta, not all the irreligious people are atheists; indeed, since the late 20th century there has been an increasing distancing from both Christian dogmatism and atheism, and at the same time ideas and non-institutional models similar to those of Eastern religions have become widespread through movements started by various gurus, and hermetic and mystical paths.
At the beginning of the Communist era, Czechoslovakia had a varied religious tradition, with Roman Catholicism as the dominant faith alongside Protestant, Orthodox, Jewish, and Uniate communities. The communist regime sought to suppress religion, promoting "scientific atheism" through policies that restricted clergy, closed monasteries, and controlled religious education. The 1950s saw mass arrests of clergy and the forced suppression of the Greek Catholic Church in favour of Orthodoxy.
The Slavic Native Faith in Ukraine has an unspecified number of adherents which ranges between the thousands and the tens of thousands.
Slavic Native Faith and Christianity are mutually critical and often directly hostile to each other. Among the Slavic Native Faith critiques are a view of religious monotheism as the root of mono-ideologies, by which is meant all ideologies that promote "universal and one-dimensional truths", unable to grasp the complexity of reality and therefore doomed to failure one after the other. These mono-ideologies include Abrahamic religions in general, and all the systems of thought and practice that these religions spawned throughout history, including both Marxism and capitalism, the general Western rationalistic mode of thinking begotten by the Age of Enlightenment, and ultimately the technocratic civilisation based on the idea of possession, exploitation and consumption of the environment. They are regarded as having led the world and humanity to a dead-end, and as destined to disappear and to be supplanted by the values represented by Rodnovery itself. To the "unipolar" world created by the mono-ideologies, and led by the American-influenced West, the Rodnovers oppose their political philosophy of "nativism" and "multipolarism".
A decline of Christian affiliation in the Western world has been observed in the decades since the end of World War II. While most countries in the Western world were historically almost exclusively Christian, the post-World War II era has seen developed countries with modern, secular educational facilities shifting towards post-Christian, secular, globalized, multicultural and multifaith societies.
Freedom of religion in Ukraine refers to the extent to which people in Ukraine are freely able to practice their religious beliefs, taking into account both government policies and societal attitudes toward religious groups.
