World Religion Percentage 2024. This chart shows the world's largest religious groups in 2015 and in 2060 (projection). Vatican city has the highest percentage of christians, with 100% of its residents being christians.
As of 2010, christianity was by far the world’s largest religion, with an estimated 2.2 billion adherents, nearly a third (31%) of all 6.9 billion people on earth. The world religion database (wrd) contains detailed statistics on religious affiliation for every country of the world.