This subject is huge so I just give you the link:
http://en.wikipedia.org/wiki/Religion_in_Africa
Africa is a continent and not a country so there are many many local religions and faiths side by side with the big ones.
Muslim
The second main religion in Africa would be Christianity, which was brought to Africa after the slave trade, during the Colonial Era.
catholic Christan
The full name of the religious group COGIC is 'Church of God in Christ'. They are made up of mostly Africa-American members and it is the fifth largest Christian church in the United States.
Hindus are the dominant religious group of the Indian Subcontinent. Arabs are the dominant ethnic group of the Middle East and North Africa. The two are entirely unrelated.
A religious group can be called a sect. A religious group can also be called a congregation when all attend the same church. A religious group might have more than one sect, or group of individuals, like the Amish.
Islam
South Africa is in Group A. Group A: Uruguay, Mexico, South Africa, France.
A religion group is a community of people who share common beliefs, practices, and rituals related to a specific religion. Members of a religion group often come together for worship, spiritual guidance, and to support each other in living according to their religious beliefs.
the religious group were the puritans
Catholics
DNA !... You're linked to your ethnic group - by DNA. What religious group you belong to - is your choice.