Which of the following countries has the largest Christian population?

The Philippines is known for having the largest Christian population among the countries listed. This is primarily due to its historical context where Spanish colonization introduced Christianity in the 16th century, leading to a significant conversion of the local population. As a result, approximately 86% of the population in the Philippines identifies as Christian, with the majority being Roman Catholic.

Understanding the religious demographics of the other countries provides further context. Australia, while having a substantial Christian community, is more religiously diverse, and its Christian population does not surpass that of the Philippines. Malaysia and Indonesia both have significant Muslim populations, with Indonesia recognized as the country with the largest Muslim demographic in the world. In Malaysia, Islam is the state religion, and Christians make up a smaller percentage of the overall population compared to the Philippines. Hence, the Philippines stands out with its robust Christian majority, confirming it as the country with the largest Christian population among the options provided.