Predominant religion by country reference
This reference lists the largest religious group for each country together with an approximate share of the population. It helps with demographic context, market research and cultural orientation, and is searchable both by country and by religion.
How it works
Each country entry records the single largest religious affiliation and a rounded percentage share. There is no calculation — the data comes from censuses and surveys, which vary in age and method. The tool supports two lookups:
- By country — see the predominant religion and its approximate share.
- By religion — list every country where that religion is the majority group.
The share describes a plurality or majority, not unanimity: a 60 percent figure means a large minority follows other beliefs or none. Where the largest group is the non-religious or unaffiliated, the entry says so. East Asian entries are simplified because religious identity there is often overlapping and not exclusive.
How religion data is collected — and why it is imperfect
Census data on religion is some of the most variable and politically sensitive data collected by governments. A few issues affect how to read these figures:
What is being measured varies. Some censuses ask about belief and practice; others ask about community or cultural affiliation; others simply ask about identity. A person who identifies as Christian for census purposes may attend services rarely or never — and vice versa. Self-reported religious identity and active religious practice are different things that different surveys conflate.
Many countries do not ask. Several European democracies, including France and Germany (in the modern census), do not collect religion data from all residents. Figures for these countries come from surveys or extrapolations, which carry additional uncertainty.
State religions complicate voluntary affiliation. In countries with official state religions, citizens may self-identify with the majority faith as a social or cultural default even if they do not practise. This can inflate majority shares.
East Asian religious identity overlaps in ways that do not fit a single majority label. In Japan, China, South Korea, and Vietnam, individuals commonly identify with more than one tradition simultaneously — Buddhism, Taoism, Confucian ethics, and local folk religion coexist within single households. Reducing this to one predominant religion simplifies a genuinely plural picture.
Practical uses and limitations
This data is appropriate for:
- Cultural context when entering a new market or designing for a new audience — understanding that a country is predominantly Buddhist, Muslim, or secular Christian shapes design and content decisions around holidays, imagery, and communication norms.
- Market research — religious demographics correlate with dietary restrictions, financial product restrictions (halal finance), and seasonal consumer behaviour that affects sales planning.
- Demographic analysis — paired with population data, religious majority shares can inform global research or journalism.
It is not appropriate for individual-level assumptions — a person’s country of origin and the majority religion of that country do not reliably predict the person’s own beliefs, practice, or identity. Country-level labels flatten real diversity.
Tips and example
- Searching Islam returns countries across the Middle East, North Africa, Central and South Asia and parts of Southeast Asia where it is the majority faith.
- A predominant share of, say, 55 percent is a reminder to design for diversity — nearly half the population is outside the majority group.
- In several East Asian countries the figures blend folk religion, Buddhism and the non-religious; read those as indicative rather than exclusive categories.
- For rigorous work, cite the specific census or survey and year, since religion data is updated infrequently and measured inconsistently across countries.