Christianity is the largest religion in the world, with over 2.4 billion followers.

Indonesia is the country with the largest Muslim population, with over 238 million Muslims.

Islam is the fastest growing religion in the world, with an annual growth rate of 2.9%.

India is the country with the largest Hindu population, with over 1.1 billion Hindus.

Christianity is the most geographically dispersed religion, with adherents in every country in the world.

China is the country with the largest Buddhist population, with over 244 million Buddhists.

Christianity is the most practiced religion in Africa, with over 630 million adherents.

Hinduism is the most practiced religion in Asia, with over 1.1 billion adherents.

Christianity is the most practiced religion in Europe, with over 590 million adherents.

Christianity is the most practiced religion in North America, with over 240 million adherents.

Christianity is the most practiced religion in South America, with over 420 million adherents.

Christianity is the most practiced religion in Oceania, with over 23 million adherents.

There is no permanent population in Antarctica, so there is no dominant religion.

In general, countries with larger populations tend to have more religious adherents than countries with smaller populations.

Some religions, such as Catholicism, discourage the use of contraception, which can lead to higher population growth. Other religions, such as Buddhism, encourage celibacy, which can lead to lower population growth.