The CIA World Factbook (2020 estimate) states that around 46.1% of the population are Muslims, 30.6% adhere to traditional faiths, 18.9% are Christians, and 4.4% are non-religious or practice other religions.
[1] Meanwhile, the US State Department mentions that estimates vary greatly and cites the Pew Forum data (2020) of 46% Muslim, 31% indigenous religious practices, and 19% Christian.
[2] Christians are mostly found along the coastal regions, and belong to the Roman Catholic Church (including Portuguese Bissau-Guineans) and various Protestant denominations.
[2] In 2017, Sunni Islam, including that of Sufi-oriented, were most concentrated in the northern and northeastern parts of the country, while practitioners of traditional indigenous religious beliefs generally live in all but the northern parts of the country.
[2] The vast majority of Muslims in the country are Sunni of Maliki school of jurisprudence, with Sufi influences.