Here’s a practical snapshot of worldwide Christians by denomination :

Denomination / tradition Estimated followers worldwide
Roman Catholic About 1.3 billion
Protestant evangelical Over 420 million
Pentecostal / Charismatic More than 663 million, with overlap
Orthodox No single clean global total in the source I found, but Eastern Orthodoxy is often grouped into many distinct churches
These figures come from a recent global Christianity statistical summary, which also says Christians make up about 2.6 billion people worldwide, or 32.3% of the global population.

Important note

The biggest catch is that denomination counts overlap. For example, many Pentecostal and Charismatic Christians are also counted as Evangelicals, so you should not add those numbers together.

Wider context

A broader Pew-based global Christianity report estimated about 2.18 billion Christians in 2010, while more recent global summaries put the total closer to 2.6 billion in 2025.

If you want a cleaner breakdown, I can also format this as:

  • Catholic vs Protestant vs Orthodox vs Independent
  • Largest denominations by member count
  • A fuller HTML table with the best available estimates