Which Christian denomination is numerically the largest by population?

• A. Roman Catholic
• B. Eastern Orthodox
• C. Protestant
• D. Anglican

Answer: (A)

Global Christian population patterns show that the Roman Catholic Church is the largest single denomination by membership. It commands roughly 1.2 to 1.4 billion adherents worldwide, a reach spanning the Americas, Europe, Africa, and parts of Asia. This broad, continuous organization has grown and diversified for centuries, giving it a larger following than any other individual denomination. In comparison, Eastern Orthodox communities number in the hundreds of millions, Anglicanism is smaller, and Protestantism is a broad umbrella of many distinct denominations—none of which individually surpass the Catholic Church in total membership. So the Roman Catholic Church is the largest by population.