A comprehensive demographic study of more than 200 countries finds that there are 2,180,000,000 Christians of all ages around the world, representing nearly a third of the estimated 2010 global population
Although Christians comprise just under a third of the world’s people, they form a majority of the population in 158 countries and territories, about two-thirds of all the countries and territories in the world.
About half are Catholic. Protestants, broadly defined, make up 37%. Orthodox Christians comprise 12% of Christians worldwide.At the same time, Christianity has grown enormously in sub-Saharan Africa and the Asia-Pacific region, where there were relatively few Christians at the beginning of the 20th century. The share of the population that is Christian in sub-Saharan Africa climbed from 9% in 1910 to 63% in 2010, while in the Asia-Pacific region it rose from 3% to 7%.
