When speaking of Sanatana Dharma in the context of global demographics, most contemporary sources use the category of “Hinduism,” treating the two as referring to the same broad religious community. On that basis, the number of people who identify with or practice this tradition is commonly estimated at approximately 1.2 to 1.3 billion worldwide. This places it as the third-largest religious affiliation after Christianity and Islam. In proportional terms, this amounts to roughly 15–17% of the world’s population.

Within this vast community, only a smaller subset explicitly uses the term “Sanatana Dharmī” for self-identification, yet statistical surveys rarely distinguish this nuance and instead record adherents simply as “Hindu.” The heartland of this tradition lies in South Asia, especially India, which accounts for the great majority of its followers, with many millions more spread across neighboring countries and a far‑reaching global diaspora. These figures arise from demographic studies and census data, and while exact numbers vary slightly from one source to another, they consistently affirm that Sanatana Dharma, under the name of Hinduism, encompasses well over a billion practitioners.

From a spiritual perspective, these numbers hint at the breadth of an “eternal way of life” that is lived in countless local forms yet recognized as a single, overarching dharmic stream. The statistical picture, though necessarily approximate, points to a living tradition that is not confined to a single region or culture, but has taken root in many lands while retaining continuity with its ancient foundations.