According to the 2011 census, 36% of the population are members of the Free Wesleyan Church, including the king and the majority of the royal family. The Church of Jesus Christ of Latter-day Saints is the next largest group (18%), followed by the Roman Catholic Church (15%), and three further Methodist denominations, the Free Church of Tonga (12%), the Church of Tonga (7%), and the Tokaikolo Christian Church (2.5%). Tonga also has members of the Seventh-day Adventist Church, Anglicans, adherents of the Bahá'í Faith, Hinduism, Buddhism and Muslims, all of which constitutes less than 3% of the population.
Foreign missionaries are active in the country and operate freely. The Constitution of Tonga provides for freedom of religion and the government generally respected this right in practice. The US government found that there were no reports of societal abuses or discrimination based on religious belief or practice in 2007.
Tongans are ardent church goers. Church service usually follows a call and response structure. Singing in the church is often done a cappella. Although a church attends primarily to the spiritual needs of the population, it also functions as the primary social hub.
Sunday in Tonga is celebrated as a strict sabbath, enshrined so in the constitution, and despite some voices to the opposite, the Sunday ban is not likely to be abolished soon. No trade is allowed on Sunday, except essential services, after special approval by the minister of police. Those that break the law risk a fine or imprisonment.
Along with others from Oceania, some Tongan Christians have attempted to develop their own unique theology which addresses the contextual questions offered by people of the Pacific. This includes the coconut theology of the Methodist Sione 'Amanaki Havea or the incarnational theology of the Roman Catholic Bishop Patelesio Finau.
The Church of Jesus Christ of Latter-day Saints claims it has over 60,600 members which is about 57% of the population of Tonga. According to The Church of Jesus Christ of Latter-day Saints, Tonga has a higher per-capita number of Latter-day Saints than any other country in the world. However, according to 2011 census, only 18.01% of Tongans belong to LDS Church and Tongans belonging to mainstream Christian denominations represent majority of the population.
The Bahá'í Faith in Tonga started after being set as a goal to introduce the religion in 1953, and Bahá'ís arrived in 1954. With conversions and pioneers the first Bahá'í Local Spiritual Assembly was elected in 1958. Less than forty years later, in 1996, the Bahá'ís of Tonga established their paramount Bahá'í school in the form of the Ocean of Light International School. Around 2004 there were 29 local spiritual assemblies and about 5% of the national population were members of the Bahá'í Faith though the Tonga Broadcasting Commission maintained a policy that does not allow discussions by members of the Bahá'í Faith of its founder, Bahá'u'lláh on its radio broadcasts.
|Refuse to answer||0||10||1,698||275|
|Free Wesleyan Church||40,371||39,703||38,052||36,592|
|Free Church of Tonga||10,413||11,226||11,599||11,863|
|Church of Tonga||6,882||7,016||7,295||6,935|
|Tokaikolo Christian Church||3,047||2,919||2,597||2,533|
|Seventh-day Adventist Church||2,143||2,381||2,282||2,331|
|Assembly of God||565||1,082||2,350||2,602|
|Constitutional Church of Tonga||0||845||941||961|
|Other Pentecostal Denomination||0||0||0||1,034|