The U.S. government estimates the total population at 56.6 million (midyear 2020 estimate). According to the most recently available estimates, approximately 88 percent are Theravada Buddhists. Approximately six percent are Christians (primarily Baptists, Roman Catholics, and Anglicans, along with several small Protestant denominations). Muslims (mostly Sunni) comprise approximately four percent of the population. The 2014 census excluded Rohingya from its count, but NGOs and the government estimated the overwhelmingly Sunni Muslim Rohingya population at 1.1 million prior to October 2016. According to estimates from the UN High Commissioner for Refugees and other organizations, more than 700,000 Rohingya fled to Bangladesh beginning in August 2017, and an estimated 520,000 to 600,000 remain in Rakhine State. There are an estimated 130,000 Rohingya living in internally displaced persons (IDP) camps, according to Human Rights Watch. There are small communities of Hindus and practitioners of traditional Chinese and indigenous religions. There is a very small Jewish community in Yangon (Rangoon).

There is a significant correlation between ethnicity and religion. Theravada Buddhism is the dominant religion among the majority Bamar ethnic group and among the Shan, Rakhine, Mon, and numerous other ethnic groups. Various forms of Christianity are dominant among the Kachin, Chin, and Naga ethnic groups. Christianity also is practiced widely among the Karen and Karenni ethnic groups, although many Karen and Karenni are Buddhist and some Karen are Muslim. Individuals of South Asian ancestry, who are concentrated in major cities and in the south-central region, are predominantly Hindu or Muslim, although some are Christian. Ethnic Rohingya and Kaman in Rakhine State, as well as some Bamar and ethnic Indians in Yangon, Ayeyarwady, Magway, and Mandalay Regions, practice Islam. Chinese ethnic minority groups generally practice traditional Chinese religions and to a lesser extent Islam and Christianity. Some smaller ethnic groups in the highland regions observe traditional indigenous beliefs.

The U.S. government estimates the total population at 16.9 million (midyear 2020 estimate). According to the MCR, approximately 95 percent of the population is Buddhist, of whom 95 percent practice Theravada Buddhism. The remaining 5 percent of the population includes Christians, Muslims, animists, Baha’is, Jews, and Cao Dai adherents. Ethnic Vietnamese traditionally practice Mahayana Buddhism, although many have adopted Theravada Buddhism. Other ethnic Vietnamese practice Roman Catholicism, and these make up the vast majority of Catholics in the country. Catholics constitute 0.4 percent of the population. Nongovernmental estimates of the Protestant population, including evangelical Christians, vary but are less than 2 percent of the total population.

According to government estimates, approximately 2.1 percent of the population is Muslim, although some nongovernmental organizations (NGOs) estimate Muslims constitute 4 to 5 percent of the population. The Muslim population is predominantly ethnic Cham, although not all Cham are Muslim. The Cham typically live in towns and rural fishing villages on the banks of the Tonle Sap Lake and the Mekong River, as well as in Kampot Province. There are four main Islamic traditions represented in the country. Nearly 90 percent of Muslims are adherents to Sunni Islam, subscribing to the Shafi’i school of Islamic law. The remaining minority practice Salafist, Wahhabist, and Ahmadi doctrines. A portion of the Cham community also subscribes to the indigenous Iman-San sect of Islam, combining traditional ancestral practices with Sunni Islam.

An estimated 0.28 percent of the population is ethnic Phnong, the majority of whom follow animistic religious practices. An additional estimated 0.25 percent of the population includes Baha’is, Jews, and Cao Dai adherents.

The U.S. government estimates the total population at 7.5 million (midyear 2020 estimate). According to the 2015 national census, 64.7 percent of the population is Buddhist, 1.7 percent is Christian, 31.4 percent report having no religion, and the remaining 2.1 percent belong to other religions. Theravada Buddhism is the dominant religion of the ethnic or “lowland” Lao, who constitute 53.2 percent of the overall population. According to the Lao Front for National Development (LFND), an organization associated with the Lao People’s Revolutionary Party (LPRP) that, along with MOHA, is responsible for the administration of religious organizations, the remainder of the population comprises 50 ethnic minority groups, most of which practice animism and ancestor worship. Animism is predominant among Sino-Thai groups, such as the Thai Dam and Thai Daeng, and the Mon-Khmer and Burmo-Tibetan groups. Among lowland Lao, many pre-Buddhist animist beliefs are incorporated into Theravada Buddhist practice, particularly in rural areas.

Roman Catholics, Protestants, Muslims, Baha’is, Mahayana Buddhists, Seventh-day Adventists, members of The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ), and followers of Confucianism together constitute less than 3 percent of the population. According to the international Catholic Church-affiliated NGO Aid to the Church in Need’s Religious Freedom in the World 2018 report, its most recent, Christians comprise 3.2 percent of the population. The Catholic Church estimates its membership at 55,200, the LEC estimates its membership at more than 200,000, and the Seventh-day Adventist Church estimates its adherents at 1,800. Muslim community leaders estimate the community has approximately 1,000 members.

The U.S. government estimates the total population at 32.7 million (midyear 2020 estimate). According to the most recent census in 2010, 61.3 percent of the population practices Islam; 19.8 percent, Buddhism; 9.2 percent, Christianity; 6.3 percent, Hinduism; 1.3 percent, Confucianism, Taoism, or other traditional Chinese philosophies and religions; and less than 1 percent each of other religious groups that include animists, Sikhs, Jehovah’s Witnesses, The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ), and Baha’is. Almost all Muslims practice Sunni Islam of the Shafi’i school. Ethnic Malays, defined in the federal constitution as Muslims from birth, account for approximately 55 percent of the population. Rural areas – especially in the peninsular east coast of the country – are predominantly Muslim, while the states of Sabah and Sarawak on the island of Borneo have relatively higher numbers of non-Muslims. Two-thirds of the country’s Christian population inhabits the East Malaysian states of Sabah and Sarawak.

The U.S. government estimates the country’s total population at 69.0 million (midyear 2020 estimate). The 2010 population census, the most recent available, indicated 93 percent of the population is Theravada Buddhist and 5 percent Muslim. NGOs, academics, and religious groups state that 85 to 95 percent of the population is Theravada Buddhist and 5 to 10 percent Muslim. Other groups, including animists, Christians, Confucians, Hindus, Jews, Sikhs, and Taoists, constitute the remainder of the population.

Most Buddhists incorporate Hindu and animist practices into their worship. The Buddhist clergy (sangha) consists of two main schools of Theravada Buddhism: Mahanikaya and Dhammayuttika. The former is older and more prevalent within the monastic community.

Islam is the dominant religion in three of the four southernmost provinces (Narathiwat, Yala, and Pattani) near the Malaysian border, commonly referred to as the Deep South. The majority of Muslims in those provinces are ethnic Malay, but the Muslim population nationwide also includes descendants of immigrants from South Asia, China, Cambodia, and Indonesia, as well as ethnic Thai. Statistics provided by the Religious Affairs Department (RAD) of the Ministry of Culture indicate that 99 percent of Muslims are Sunni.

The majority of ethnic Chinese and Vietnamese practice either Mahayana or Theravada Buddhism. Many ethnic Chinese, as well as members of the Mien hill tribe, also practice forms of Taoism.

The majority of Christians are ethnic Chinese, and more than half of the Christian community is Roman Catholic.