World Religions

Scholars generally describe religion as a system of shared beliefs, practices, ethical commitments, and community life organized around what adherents regard as sacred or transcendent. Religions are not only about abstract ideas; they also shape daily rhythms, life-cycle rituals, legal codes, art, music, architecture, and the way communities respond to birth, illness, suffering, and death. Because religious traditions have interacted with politics, migration, trade, and colonial history for millennia, their present-day distribution reflects long and often complicated historical processes.

There is no single authoritative count of the world's religions. Researchers recognize thousands of distinct traditions, though a relatively small number have global reach. The Pew Research Center and the Gordon-Conwell Center for the Study of Global Christianity publish regular estimates of adherents by tradition and region. According to these widely cited sources, as of the mid-2020s approximate global figures are: Christianity around 2.4 billion adherents, Islam around 2 billion, Hinduism around 1.2 billion, Buddhism between 500 and 535 million, folk and ethnic religions over 400 million, Sikhism between 25 and 30 million, and Judaism around 15 million. The religiously unaffiliated, sometimes called "nones," number approximately 1.2 billion. Specific figures shift from year to year and vary between surveys; readers are encouraged to consult primary sources for current data.

Geographic distribution is highly uneven. Christianity is the most globally dispersed tradition, with large communities on every inhabited continent. Islam spans a broad arc from North Africa through the Middle East, South Asia, and into Southeast Asia, with the largest Muslim-majority country being Indonesia. Hinduism is concentrated in India and Nepal, with substantial diaspora communities. Buddhism is rooted in South, Southeast, and East Asia. Judaism is concentrated in Israel and the United States. The unaffiliated are most numerous in East Asia, especially in China, and in parts of Europe.

This page introduces each major tradition on its own terms, using widely accepted scholarly descriptions. It does not make claims about religious truth and does not advocate for any tradition. Dedicated child pages provide deeper treatment of each religion, and country profiles explore religious demographics in national context.