Updates

The World Religion database is updated twice a year, following research cycles.

Survey results

01 Jan 2011

a further 239 surveys and censuses

Analyzed results from a further 239 surveys and censuses have been added:

113 Country Census (wide range of years)
44 Demographic and Health Survey (mostly 2000 and 2001)
82 Pew Global Attitudes Project (2002 and 2007)

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Religious Pluralism

01 Oct 2010

Two measures of religious diversity are added

Two measures of religious diversity are added to the World Religion Database this quarter. Firstly, simple counts of religions over certain proportions are shown by country. Secondly, a religious diversity index is calculated using the Herfindahl Index, a measure used by many economists to indicate how market competition is spread among businesses in an industry. See the queries of the most religiously diverse countries under 'Religious Pluralism' on the Top 20 lists page.

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Religions

All major world religions, available by geographic region and people groups.

Geography

Comprehensive country religious makeup, demographics, and trends.

Religious diversity

Religious Diversity Index (RDI) and counts of religions over 10%, over 5%, and over 0.5%.

Contextual data

Population data by country, plus socio-economic, health, environment, and gender indicators.

Censuses

Historical and current census data on religion by country.