This category has the following 17 subcategories, out of 17 total.
- Religious organizations established in the 1900s (14 C, 2 P)
- 1900s in Christianity (13 C)
- 1900s in Islam (2 C, 6 P)
- 1900s in Judaism (12 C)
- 1900s in modern paganism (1 C)