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.
Catholic Church by country - Wikipedia
The World's Christian Population : MissionInfobank, Research resources from and for missional Christian Leaders
Where do the world's Catholics live? – Foreign Policy
PDF) The Trend to Discriminate Christians: Shifting from the 'Post-Christian' West to the Global South
Pagan Population - Worldmapper
Visualizing the World's Most Popular Religions
Christianity by country - Wikipedia
Regional Distribution of Christians
Membership, map and statistics
Global Christianity and the Control of Its Neglected Tropical Diseases
Global Christianity: A Report on the Size and Distribution of the World's Christian Population
List of religious populations - Wikipedia
