The International Religious Freedom Report 2008, submitted by the United States Department of State to Congress as required by the International Religious Freedom Act of 1998, provides the following summary of religious affiliation in Barbados:
Anglicanism constitutes the largest religious group, with 70,000 members; an estimated 67 percent are active. It is represented by the Church in the Province of the West Indies, within which the island belongs to the Diocese of Barbados. The next largest group is the Seventh-day Adventists, numbering 16,000 members, 10,000 of whom are active. There are 11,000 Roman Catholics; an estimated 20 percent are active. Pentecostals number 7,000; more than 50 percent are active. Methodists number 5,000, according to church officials, although many more claimed Methodist affiliation in the previous official census; an estimated 60 percent are active. There are 2,500 members of Jehovah's Witnesses; more than 95 percent are active. Baptists, Moravians, and members of the Church of Jesus Christ of Latter-day Saints (Mormons) are present in small numbers.
The number of non-Christians is small. There are 4,000 Muslims, most of whom are immigrants or descendants of Indian immigrants from the Indian state of Gujarat. There are three mosques and an Islamic centre. Other religious groups include Rastafarians, Hindus, Buddhists, and members of the Baha'i Faith.
The reference work Religions of the World provides the following data for Barbados:
|Religion||Followers in 1970||Followers in 2010||% of Population 2010|
Although Roman Catholics are inexplicably missing from the above chart, the same reference book gives their percentage as 4 percent in 1980 and 4.2 percent in 2000.