About 2 billion.
Christianity has the highest population in the world, with over 2.3 billion followers.
In 2009, the world' population was approximately 6.8 billion.
The religion with the largest population percentage in the world is Christianity.
The population of the world continues to grow by the day. In the year 2009, the world tipped the scale with 6.8 billion people living in it.
Christianity has spread to many parts of the world. The faith represents approximately one-third of the world's population and is the largest religion in the world.
What is the population in wales
6,706,993,152
Christianity is the most popular religion in the world, at 2.1 billion members (33% of the world), followed by Islam with 1.5 billion (21%).
As of now, there is 2.4 billion christians around the world. On the other hand, Islam has a population of 1.6 billion.
Muslims comprise of about 23% of the World's population, making it the second largest religion after Christianity.
The population of Miami in 2009 was approximately 5,547,051, according to the World Almanac 2011.
Christianity is the largest religion today. There are about 2 billion followers worldwide, which is 33% of the world population.