How many Christian denominations are there?
There are about 34,000 different Christian groups in the world since AD 30. This is according to the World Christian Encyclopedia published in 2001. 1,200 different Christian denominations exist in the United States alone. Some groups classify Christianity into 8 meta-groups, namely Roman Catholicism (the largest), Eastern Orthodoxy, Oriental Orthodoxy and Assyrian Churches, Protestantism, Restorationism, Anglican Communicants, Pentecostal, and others.