Christianity is the predominant religion of the world. It has been estimated that there are currently around 2.2 billion Christians in the world, as opposed to 1.2 billion moslems, 800 million hindus and 360 million Buddhists. This number (2.2 billion) represents around 34% of the world's population, including those who have no religion at all, or 40% of the world's population that have a religion.
This number is just an estimate, as there are some countries - notably China - where Christianity is growing repidly, and, because of threatened persecution, many Christians there are very secretive of their faith making data difficult to obtain. Nevertheless, it is believed that in China alone there may well be 0.1 billion Christians which is likely to triple in the next decade if growth in the Chinese Church continues at the same rate.
I suppose that you would say that technically no one did, as Christianity as such started after Jesus' death, resurrection, and ascension. If you are asking abut how many followers or disciples Jesus had, there is no record of that, although we can say that the number was greater than 500, based on I Corinthians 1:5.
Christianity is the largest religion in terms of adherents.
World wide there are about 2 Billion Christians.
About 2 billion.
There are an estimated 2.1 billion followers of Christianity.
Over 1,000,000 members worldwide
It has over 498750565 members worldwide
There are millions of Christians worldwide. Christianity is one of the most widely accepted religions among many cultures in the world.
Christianity is worldwide, but appears to be strongest in English-speaking countries.
6 million worldwide
Christianity is the largest religion today. There are about 2 billion followers worldwide, which is 33% of the world population.
About 2.2 billion people, nearly 33 percent of the world's population
Christianity is worldwide, but appears to be strongest in English-speaking countries.
Christianity I hope.
Worldwide, that would be Christianity.
6.2 billion