In the US alone:::::

"""Using the National Congregations Study (NCS) conducted in 2006 and 2012, ... estimates the number of congregations in the US increased from 336,000 in 1998 to a peak of 414,000 in 2006, but then leveled off at 384,000 in 2012.
"""
Since every church/congregation practices its own variation of what ever they find useful to keep their flock paying tribute, each can be considered a separate religion

Islam mosks are in the thousands as well.

Same for all the others.

So, hundreds of thousands. Sorta demonstrates the stupidity of any one thinking they are the true believers.

references:
[christianitytoday.com]

[hirr.hartsem.edu]

Yeah but they're still nuts