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Muslims make up a majority of the population in 49 countries around the world. The country with the largest number (about 209 million) is Indonesia, where 87.2% of the population identifies as Muslim. India has the worldâs second-largest Muslim population in raw numbers (roughly 176 million), though Muslims make up just 14.4% of Indiaâs total population.
The most populous country in the world is China with 1,350 million recorded in 2010, representing 20% of the total world population. Chinaâs population increases annually about 10 million people.Other Interesting: 1  Largest Cities in the World by Population.hinaâs population increases annually about 10 million people. The worldâs most populous country overcame the barrier of 1,000 million in 1980 and it is expected that by the year 2043 will reach 1.550 million, a figure which growth would stagnate.