Largest denominations in the world
- Catholicism – 1.2 billion
- Protestantism – 670 million
- Historical Protestantism – 350 million
- Modern Protestantism – 274 million[citation needed]
- Eastern Orthodoxy – 210 million
- Autocephalous churches
- Autonomous churches
- Non-universally recognized churches
- Other separated Orthodox groups
- Oriental Orthodoxy – 75 million
- Autocephalous churches in communion
- Autonomous churches in communion
- Churches not in communion
- Anglicanism – 82 million
- Nontrinitarianism – 27 million
- Nestorianism – 1 million