Christianity by far the largest religion on the planet
… In fact, the United States has the world's largest Christian population, of more than 247 million, followed by Brazil and Mexico, China also appears on the list of top 10 largest Christian populations - with an estimated 67 million Christians. There are nearly 2.2 billion Christians around the world, making up about one-third of the world's population. Islam is the world's second largest religion, with about 1.6 billion followers worldwide. Three of the world's ten largest Christian populations are in Africa: Nigeria, the Democratic Republic of Congo and Ethiopia. The report calculates that half the world's Christians are Catholic, 37% are Protestants, and 12% are Orthodox.
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