As of 2020, Christianity was the largest religion in the world, with around 2.5 billion believers. In the second place was Islam, with around 1.9 billion adherents.
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Encyclopædia Britannica. (May 31, 2024). Global population worldwide in 2020, by religion [Graph]. In Statista. Retrieved July 05, 2025, from https://www.statista.com/statistics/1079959/world-religions-population/
Encyclopædia Britannica. "Global population worldwide in 2020, by religion." Chart. May 31, 2024. Statista. Accessed July 05, 2025. https://www.statista.com/statistics/1079959/world-religions-population/
Encyclopædia Britannica. (2024). Global population worldwide in 2020, by religion. Statista. Statista Inc.. Accessed: July 05, 2025. https://www.statista.com/statistics/1079959/world-religions-population/
Encyclopædia Britannica. "Global Population Worldwide in 2020, by Religion." Statista, Statista Inc., 31 May 2024, https://www.statista.com/statistics/1079959/world-religions-population/
Encyclopædia Britannica, Global population worldwide in 2020, by religion Statista, https://www.statista.com/statistics/1079959/world-religions-population/ (last visited July 05, 2025)
Global population worldwide in 2020, by religion [Graph], Encyclopædia Britannica, May 31, 2024. [Online]. Available: https://www.statista.com/statistics/1079959/world-religions-population/
