9780310113614_image (2)Christianity is now a majority-global South religion, with more believers living in Africa, Asia, and Latin America than in Europe and North America. However, most Americans have little exposure to Christians around the world. Global Christianity: A Guide to the World’s Largest Religion (Zondervan, 2022) is an accessible reference work to help readers understand changes in Christianity in every country of the world with maps, charts, and short narratives.

WCE_cover_FRONT_BMThe World Christian Encyclopedia is the authoritative reference work on global Christianity, now in its third edition (Edinburgh University Press, 2019). Its oversized 1,000 pages includes detailed information on religious adherents, Christian denominations, and history of Christianity in every country of the world. The Encyclopedia is available in hardback (paperback forthcoming from Hendrickson Publishers) as well as PDFs.

The full-color 32-page Global Overview is available for download for only $20!


The World Christian Database and World Religion Databaseboth published by Brill, contain detailed quantitative information on Christianity and other world religions in every country of the world, with estimates for the past, present, and future.

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Select Articles

Guidry, Jeanine P.D., Carrie A. Miller, Paul B. Perrin, Linnea I. Laestadius, Gina A. Zurlo, Matthew Savage, Michael Stevens, Bernard F. Fuemmeler, Candace W. Burton, Thomas Gültzow, and Kellie E. Carlyle. “Faith Between Healthcare Practitioners and Clergy: Evangelicals and COVID-19 Vaccine Hesitancy.” International Journal of Environmental Research and Public Health, 19 (2022): 11120.

Zurlo, Gina A., Todd M. Johnson, and Peter F. Crossing. “World Christianity and Religions 2022: A Complicated Relationship.” International Bulletin of Mission Research 46, no. 1 (2022): 71–80.

Zurlo, Gina A. “The Study of World Christianity Past, Present, and Future: History, Theology, Social Sciences, and Beyond.” Journal of World Christianity 9, no. 1 (2019): 34–47.

Zurlo, Gina A., Todd M. Johnson, and Peter F. Crossing. “Christianity 2019: What’s Missing? A Call for Further Research.” International Bulletin of Mission Research, 43, no. 1 (January 2019): 92–102.

Zurlo, Gina A. “More than Numbers: David B. Barrett and the Twentieth-Century Historiography of World Christianity.” Journal of World Christianity8, no. 2 (2018): 89–108.

Zurlo, Gina A. “The Legacy of David B. Barrett.” International Bulletin of Mission Research 42, no. 1 (January 2018): 29–39.

Zurlo, Gina A. “The Social Gospel, Ecumenical Movement, and Christian Sociology: The Institute of Social and Religious Research.” The American Sociologist46, no. 2 (June 2015): 117–193.

Johnson, Todd M., Gina A. Zurlo, and Albert W. Hickman. “Embezzlement in the Global Christian Community.” The Review of Faith & International Affairs13, no. 2 (Summer 2015): 74–84.

Johnson, Todd M., and Gina A. Zurlo. “Christian Martyrdom as a Pervasive Phenomenon.” Society 51, no. 6 (2014): 679–685.

 Johnson, Todd M., and Gina A. Zurlo. “Ongoing Exodus: Tracking the Emigration of Christians from the Middle East.” Harvard Journal of Middle Eastern Politics and Policy III (2013–2014): 39–49.

Select Book Chapters

Zurlo, Gina A. “Missions and Money: Christian Finance in Global Perspective.” In Missions and Money: Global Realities and Challenges, edited by Jonathan J. Bonk, Michael D. Distefano, J. Nelson Jennings, Jinbong Kim, Jae Hoon Lee, 40–46. Littleton, CO: William Carey Publishing, 2022.

Zurlo, Gina A., and Todd M. Johnson. “Global Mission Statistics and Religious Demography.” In Oxford Handbook of Mission Studies, edited by Kirsteen Kim and Alison Fitchett-Climenhaga, 723–734. Oxford: Oxford University Press, 2022.

Pui-lan, Kwok, and Gina A. Zurlo. “World Christianity and the Challenge of Interdisciplinarity.” In World Christianity: History, Methodologies, Horizons, edited by Jehu Hanciles, 75–96. Maryknoll, NY: Orbis Books, 2021.

Zurlo, Gina A. “Religions in Europe: A Statistical Summary.” In Oxford Handbook of Religion and Europe, edited by Grace Davie and Lucian N. Luestean, 793–797. Oxford: Oxford University Press, 2021.

Zurlo, Gina A. “A Demographic Profile of Christianity in Oceania.” In Christianity in Oceania, edited by Kenneth R. Ross, Katalina Tahaafe-Williams, and Todd M. Johnson, 3–18. Edinburgh: Edinburgh University Press, 2021.

Johnson, Todd M., and Gina A. Zurlo. “The Changing Demographics of Global Anglicanism, 1970–2010.” In Growth and Decline in the Anglican Communion, edited by David J. Goodhew, 37–54. London: Routledge, 2017.

Sigg, Michele S., Eva M. Pascal, and Gina A. Zurlo. “Indigenous and Vernacular Christianity.” In The Wiley-Blackwell Companion to World Christianity, edited by Lamin Sanneh and Michael McClymond, 664–682. Oxford: Wiley-Blackwell, 2016.

Zurlo, Gina A. “The Demographics of Global Evangelicalism.” In Evangelicals Around the World: A Global Handbook for the 21stCentury, edited by Brian Stiller and Karen Stiller, 34–47. Nashville: Thomas Nelson, 2015.