What is the biggest religion in the earth?

Answer 1

Islam

Christianity is currently the largest religion in the world. It is followed by about 33% of all people -- a percentage that has remained stable for decades. If current trends continue, Islam will become the most popular world religion sometime in the mid-21st century.

About 21% of all people on Earth follow Islam. The religion is currently in a period of rapid growth.

Answer 2

By necessity the first religion was also the largest (if there are no others then the one is automatically the largest).

Animism and shamanism were early religions and quite large (even if they were not organized into "churches" like many religions are today)

Before the Christian Era there were many pantheistic religions (with many gods)

Budhhism was a religion prior to Christianity that still has hundreds of millions of followers.

Answer 3

Christianity is the fastest growing and the biggest religion in the world. Christianity takes up 40% of the worlds population and Islam takes up 20% of the worlds population. therefore there are more Christians then Muslims and is the biggest religion.

Answer 4

Christianity

The Roman Catholics make up the largest group

Answer 5

Christianity is the largest, followed by Islam.

Answer 6

Usually the word "denomination" is used within Christianity. In any case, the largest religion is Christianity; the largest individual group worldwide is either Catholicism, or Sunna Islam.

Answer 7

Roman Catholic-for more watch Jeanne De Arc and the Exorcist

Answer 8

Christianity is the largest religion in the world, with over 2 billion followers.