Countries whose names begin with the letter A to C and N to Z are listed separately.

It is important to realize that these data are typically based on surveys of adults. In many countries, the vast majority of citizens are only nominally affiliated with a religious group. In much of Europe, less than 15% of the population actually attend church or other religious establishment weekly. In the U.S., about 40% say that they attend weekly; only 20% actually do. In Canada the corresponding numbers are about 20% and 10%

1. "The World Almanac and book of facts, 1999," World Almanac Books, (1998) Most of the above data was derived from this book. Read reviews or order this book safely from Amazon.com online book store 
2. Philip M. Parker, "Religious Cultures of the world," (1997). Read reviews or order this book "Over 26,000 statistics are provided for over 70 religious groups covering a number of social, economic, and business variables. A significant review of literature is also included."
3. "The Christian Coptic Orthodox Church of Egypt," The Coptic Network, at: http://www.coptic.net/ 
4. David Crystal, Ed., "The Cambridge Factfinder," Cambridge Univ. Press, (1994) Read reviews or order the 1998 edition of this book
5. Data for Honduras is controversial. The CIA World Factbook at: https://www.cia.gov/ gives 97% Catholic; 3% Protestant. Operation World at: http://www.operationworld.org/ gives 23% Evangelical. CID Gallup gives 36% Evangelical/Protestant. Good luck to anyone who is trying to determine reality.

Web ReligiousTolerance.org