How Many People, Christians, and Catholics?

The Pew Forum report linked below gives a basis for making the following approximations:

People in the world – 7 billion

Christians in the world – 2.2 billion (almost one out of three)

Catholics in the world – 1.1 billion  (50% of Christians)

Protestants in the world – 0.8 billion (37% of Christians)

Orthodox in the world – 0.250 billion (12% of Christians)

Global Christianity – A Report on the Size and Distribution of the World’ s Christian Population- Pew Forum on Religion & Public Life (December 19, 2011).

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