As of the year 2023, Christianity had approximately 2.4 billion adherents and is the largest religion by population. According to a PEW estimation in 2020, Christians made up to 2.38 billion of the worldwide population of about 8 billion people. It represents nearly one-third of the world's population and is the largest religion in the world, with the three largest groups of Christians being the Catholic Church, Protestantism, and the Eastern Orthodox Church. The largest Christian denomination is the Catholic Church, with 1.3 billion baptized members. The second largest Christian branch is either Protestantism, or the Eastern Orthodox Church.
Christianity and Islam are the two main religions practiced in Nigeria The country is home to some of the world's largest Christian and Muslim populations, simultaneously. Reliable recent statistics do not exist; however, Nigeria is divided roughly in half between Muslims, who live mostly in the northern region, and Christians, who live mostly in the southern region of the country. Indigenous religions, such as those native to the Igbo and Yoruba ethnicities, have been declining for decades and being replaced by Christianity or Islam. The Christian share of Nigeria's population is also now on the decline, due to a lower fertility rate relative to the Muslim population in the country.
Christianity is the most widely professed religion in Cuba, with Catholicism being its largest denomination. A significant share of the Cuban population is either non-religious or practices folk religions.
Christians in Benin constitute approximately 48.5 of the country's population.
Christianity is the largest religion in Madagascar, with Protestantism and Catholicism being its main denominations.
According to various polls, the majority of Kazakhstan's citizens, primarily ethnic Kazakhs, identify as Sunni Muslims. In 2020, Shia Muslims made up 20% of the population.
The Constitution provides for freedom of religion, but the government imposes onerous criteria on religious groups for official recognition, which is required for the legal construction of houses of worship. There is no registered muslim groups in Angola.
Christianity is the predominant religion in the Republic of the Congo, with Catholicism being its largest denomination.
Christianity is the largest religion in Benin, with substantial populations of Muslims and adherents of traditional faiths.
Christianity is the most widely professed religion in Zimbabwe, with Protestantism being its largest denomination.
Christianity is the largest religion in Tanzania, with a substantial Muslim minority. Smaller populations of Animists, practitioners of other faiths, and religiously unaffiliated people are also present.
Christianity is the predominant religion in Eswatini, with Protestantism being its largest denomination. The royal family of Eswatini is officially Christian.
Christianity is the largest religion in Guinea-Bissau, with significant communities of the adherents of Islam and traditional African religions.
Religion in Eritrea consists of a number of faiths. The two major religions in Eritrea are Christianity and Islam. However, the number of adherents of each faith is subject to debate. Estimates of the Christian share of the population range from 47% and 63%, while estimates of the Muslim share of the population range from 37% to 52%.
According to the 2012 census, Islam is the most followed religion in Niger and is practiced by 99% of the population. According to Pew, roughly 80% of Muslims are Sunni of Maliki school of jurisprudence, whilst 20% are non-denominational Muslims Other religions practiced in Niger include Animism and Christianity.
Religion in Namibia is dominated by various branches of Christianity, with more than 90 percent of Namibian citizens identifying themselves as Christian. According to the government's survey, in 2013 up to two-thirds of the country was Protestant, including as much as 44% Lutheran.
Christianity is the largest religion in Mozambique, with substantial minorities of the adherents of traditional faiths and Islam.
Christianity is the majority religion in Cameroon, with significant minorities of the adherents of Islam and traditional faiths.
Christianity is the majority religion of the Democratic Republic of the Congo and is professed by around 95% of the population.
The main religion in Morocco is Sunni Islam, which is also the state religion of the country. Officially, 99% of the population are Muslim, and virtually all of those are Sunni. The second-largest religion in the country is Christianity, but most Christians in Morocco are foreigners. There is a community of the Baháʼí Faith. Only a fraction of the former number of Maghrebi Jews have remained in the country, many having moved to Israel.
