World Christian Database: field definitions

Data source: Gina A. Zurlo, ed., World Christian Database (Leiden/Boston: Brill, 2026).

Table Field Description
version_2020_country World A pop Population of World A (unevangelized) individuals in this country in 2020.
version_2020_country World B pop Population of World B (evangelized non-Christian) individuals in this country in 2020.
version_2020_country World C pop Population of World C (Christian) individuals in this country in 2020.
version_2020_country World evangelization code A country is designated as 'A' 'Unevangelized' if less than 50% of its population is evangelized. It is designated 'B' 'Evangelized non-Christian if 50% or more of its population is evangelized and less than 60% Christian. It is designated 'C' 'Christian' if 60% or more of its population is Christian.
version_2020_country Year begun The first year this country had Christian residents.
version_2020_country Zoroastrian % Number of Zoroastrians as a percentage of the country's population in year 2020. Zoroastrianism is a religion founded in Persia in BC 1200 by the prophet Zoroaster teaching the worship of Ahura Mazda, now followed by Parsis in India and a large underground presence in Iran, Afghanistan, et alia.
version_2020_country Zoroastrians Number of Zoroastrians in this country's population. Zoroastrianism is a religion founded in Persia in BC 1200 by the prophet Zoroaster teaching the worship of Ahura Mazda, now followed by Parsis in India and a large underground presence in Iran, Afghanistan, et alia.
version_2020_people Agencies code Code of mission agencies present (0-5) in this people group: 5= 20+ agencies at work; 4 = 11-20; 3= 3-10; 2= 2 agencies; 1= 1 agency; 0 = 0 agencies at work.
version_2020_people Agency count Data-entered number of mission agencies present in this people group. (Overrides number listed in Agency_note).
version_2020_people Agency note Names or initials of mission agencies working among this people group.
version_2020_people Agnostics Agnostic population for this people group in this country. These are persons professing no religion, or professing unbelief or non-belief, non-believers, agnostics, freethinkers, liberal thinkers, non-religious humanists, indifference to both religion and atheism, apathetic, opposed on principle neither to religion nor to atheism; sometimes termed secularists or materialists; also post-Christian, dechristianized or de-religionized populations.
version_2020_people Agnostics who know Christians Agnostics who know Christians.
version_2020_people Alien Christian code Code of alien Christians (Christians of another culture residing among this people group, 0-10): 10= Alien church members from 50% to 100% or more; 9= from 20 to under 50%; 8= 10 to 20%; 7= 5 to 10%; 6= 1% to 5%; 5=.1 to 1%; 4= an organized alien church with members from.05 to under.1%; 3= A small unorganized cluster of 2 or more alien churches; 2= A single alien congregation or worship center; 1= A few scattered alien believers, without congregations; 0= No Known Alien Believers on this Territory.
version_2020_people Atheists Atheist Population among this people group. Atheists are militantly anti-religious or anti-Christian agnostics, secularists, or marxists.
version_2020_people Audio code Numeric or Character code for availability of audio scriptures for this people group. 6/B = Audio scriptures purchasable: complete Bible; 5/A = Audio scriptures purchasable: New Testament; 4/a = Audio scriptures purchasable: gospels or other portions; 1/c = Audio/film materials, or audio scriptures in near-language; 0/. = No audio scriptures or selections available.
version_2020_people Autoglossonym People’s own name for their language.
version_2020_people Baha'is Baha’i population for this people group in this country. Baha’is are followers of the Baha’i World Faith, founded by Baha’u’llah, since 1844. In government censuses Baha’is are usually counted as Muslims or Hindus and not shown separately.
version_2020_people Biblioglossonym The official name of the language for any Scripture translation done, or under way. 'Biblioglossonym' is the name chosen by a Bible society by which a translation of the Bible, or part of it, is formally known; often the anglicized form (e.g. French, German, Russian), often the speakers’ own autoglossonym (français, deutsch, russki).
version_2020_people Braille code 1 = Braille scriptures available for the blind.
version_2020_people Broadcast note Names or initials of radio broadcasters who have been or are beaming programs to this people group.
version_2020_people Buddhists Buddhist population for this people group in this country. Followers of the Buddha, include: (a) Mahayana (Greater Vehicle) or Northern Buddhism; (b) Theravada (Teaching of the Elders) or Southern Buddhism, stigmatized by Mahayanists as Hinayana (Lesser Vehicle, i.e. available to fewer people), actually the older, purer form of Buddhism; (c) Vajrayana, Mantrayana, Guhyamantrayana, or Tantrayana (Esoteric Vehicle), known as Tantrism, Shingon or Lamaism; and (d) traditional Buddhist sects, but excluding neo-Buddhist new religions or religious movements.
version_2020_people Buddhists who know Christians Buddhists who know Christians.
version_2020_people Chinese folk-religionists Chinese folk-religionists population for this people group in this country.
version_2020_people Christian broadcasting code Countries broadcasting Christian programs in this language (0-4) to this people group. 4= Available in major language; 3= Broadcasting from several countries; 2= Broadcasting from 1 or 2 countries; 1= Local broadcasts only or any broadcast in a same-cluster language; 0= none for this people group.
version_2020_people Christian growth rate 1900 to 2020 The average annual growth rate of the Christian population from 1900 to the base year 2020.
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Religions

Data on 18 categories of religion, including non-religious, by country, province, and people.

Countries and regions

Data on all religions, Christian activities, and trends.

Denominations

Membership data, year begun, and rates of change.

Cities & provinces

Population and religion data on all major cities & provinces.

Peoples & languages

Detailed information covering religion, culture, and geography.

Archive

A repository of historical data, including a chronology of Christianity from the 1st to 21st centuries.