There is no universally agreed exact number of religions in the world. A count depends on whether “religion” means a broad tradition, a denomination, an independent organization or a local community’s practices. A short list of major world religions is therefore not a complete count of religious diversity.
The practical answer is to state the counting rule before giving a number. Lists that mix Christianity with individual Christian denominations, for example, count at different levels and cannot be compared directly.
What exactly are we counting?
- Broad traditions: names such as Christianity, Islam, Hinduism, Buddhism, Judaism and Sikhism.
- Branches and denominations: communities grouped within a wider tradition. These are not necessarily independent religions.
- Organizations: legally or administratively separate bodies, which can share beliefs.
- Local and Indigenous traditions: practices that may not have one founder, central organization or universally used name.
These levels overlap. Treating every organization as a separate religion produces a different kind of list from grouping everyone under broad traditions. Neither list answers the other’s question.
Why do some studies use seven religious categories?
Pew Research Center’s global study published in June 2025 describes the population in 2020 using seven categories:
- Christians
- Muslims
- Hindus
- Buddhists
- Jews
- People belonging to other religions
- Religiously unaffiliated people
This does not mean there are only seven religions. One category combines many traditions, and another describes people without a religious affiliation. Pew includes Sikhs, Jains, Baha’is, Daoists, Shintoists and others within its combined “other religions” category.
The report measures the sizes of population groups, not the total number of distinct religions. Its publication year must also be kept separate from the year its population estimates describe.
Why is an exact global total difficult?
Researchers need workable definitions
Demographic projects have to decide which categories their data can support. Pew’s methodology explains how censuses, surveys and other sources are combined and adjusted. A dataset’s categories serve its research purpose; they are not an official theological ruling about which communities qualify as religions.
Identity and practice are different measures
Someone can report no religious affiliation while participating in rituals or honoring ancestors. Pew’s 2024 study of East Asian societies and Vietnam documents this distinction. Counting formal identities alone can miss practices and connections that a different survey would record.
Not every source counts the same unit
The World Religion Database is another demographic resource, drawing on census material and estimates of religious affiliation. Before comparing any of its figures with another project, check the category definitions, date and geographical coverage.
For example, a count of denominations and a count of adherents measure different things. A community with few members can be one distinct organization, while a very large tradition can include many organizations.
How should you check a number you find online?
- Find the original publication, rather than a chain of pages repeating the same figure.
- Check whether the unit is religions, denominations, organizations or people.
- Check the reference year and whether extinct traditions are included.
- Look for the underlying list and the rules used to split or combine groups.
- If those details are missing, treat an exact-looking total as unverified.
Where should a beginner start?
Use a broad overview to learn names and context, then study particular traditions through their texts, communities and history. Size does not determine a tradition’s importance or truth.
For a closer look at primary texts, see our Torah introduction and our Quran introduction. If you want a printed English Quran, our translation guide explains different reading purposes and includes free alternatives.
Common questions
Are denominations separate religions?
Not automatically. A study may count denominations within a broader religion or examine them separately. The classification rule should be explicit.
Does “unaffiliated” mean everyone is an atheist?
No. Lack of religious affiliation is not the same as a single belief about God, spirituality or ritual practice.
Conclusion
There is no useful exact worldwide total without an explicit definition of what is being counted. Broad traditions, denominations, organizations and individual affiliations are different units. Demographic categories help researchers compare populations, but they are not a complete list of religions. The most reliable answer identifies the unit, reference year and evidence before interpreting the number.
Substantively revised on 1 November 2026. No precise worldwide total is asserted without a defined count. See our editorial process and AI-use disclosure.
Published by Ralf. About our editorial process.
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