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The US has the most Christians by population, with over 200 million identifying as such. The Vatican and Pitcairn Islands are 100% Christian. China has a growing Christian population, with over 55 million. There are over 2 billion Christians worldwide, with Roman Catholic being the largest denomination. Brazil, Russia, and Mexico have the second-largest number of Christians. Somalia, Yemen, and Afghanistan have the lowest percentage of Christians.
Based on population numbers alone, the country with the most Christians is the United States, with more than 200 million people, or more than 65 percent of the US population, identifying as Christians. In terms of percentage of population, the Vatican and the Pitcairn Islands are the most Christian countries, with both estimated to be 100% Christian.
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China has a rapidly growing Christian population, with about 55 million Christians, more than 5 million more than in Italy.
There are thought to be more than 2 billion Christians worldwide, with nearly 40,000 denominations. The largest denomination in terms of people is Roman Catholic, with over 1 billion adherents.
Brazil, Russia and Mexico are the countries with the second-largest number of Christians, although, measured as a percentage, Ecuador, Armenia, American Samoa and Greece all have more than 98% of their population identifying as Christian.
Countries with the lowest percentage of Christians in the population include Somalia, which has about 0.01 percent of its population identified as Christian; Yemen, with just over 0.01 percent; and Afghanistan, with about 0.02 percent.
