Total Population Of World In 2024 By Religion. It is estimated that as many as 506 million people around the world practice buddhism as a religion, which would represent roughly 6.6% of the world’s total population. Our planet’s population of about 8 billion people follows myriad religions in widely varying numbers.
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. 0.83% of its own population follow the religion.