Definition of Islam by country

Important note: Population counts by religious affiliation, like most demographic characteristics of a population, are based upon statistical science and subject to observational error and are technically referred to as estimates. Likewise, partisans may seek to bias the estimates. The percentage of Muslim population of each country was taken from the US State Department's International Religious Freedom Report 2007 [1], the CIA World Factbook [https://www.cia.gov/library/publications/the-world-factbook/] and Adherents.com [2]. It is important to note that most of the figures from these publications have no proper source. In cases of conflicting estimates, the average of lowest and highest estimates was calculated. The total population of each country was taken from census.gov [3] (2007 estimates).