The Size and Distribution of the World's Christian Population

A comprehensive demographic study finds that there are 2.18 billion Christians of all ages around the world, representing nearly a third of the estimated 2010 global population of 6.9 billion. Christians are also geographically widespread, and no single region can indisputably claim to be the center of global Christianity.

Estimated size and distribution of the world's Christian population - Christian Faith Guide

what percentage of the world is religious –

Christianity - share of world christian population by selected countries 2010

Religion: why faith is becoming more and more popular, Religion

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Christianity's retreat from England, mapped - Big Think

World Population by Religion: A Global Tapestry of Faith - Population Education

Is Canada majority Christian in its population or culture or is it irreligious? - Quora

PDF) Puerto Rico- Encyclopedia of Christianity in the Global South

Religion in Eritrea - Wikipedia

List of religious populations - Wikipedia