Irreligion in India

Around 0.7 million people in India did not state their religion in the 2001 census and were counted in the "religion not stated" category. They were 0.06% of India's population. Their number has significantly increased four times, from 0.7 million in the 2001 census to 2.9 million in the 2011 census (0.24% of India's population) at an average annual rate of 15%. According to the 2012 WIN-Gallup Global Index of Religion and Atheism report, 81% of Indians were religious, 13% were non-religious, 3% were convinced atheists, and 3% were unsure or did not respond, while a demographic study by Cambridge University Press in 2004 found that around 2-6% of Indians identified as atheists or irreligious.

Atheism and agnosticism have a long history in India and flourish within the Śramaṇa movement. Indian religions like Jainism, Hinduism and Buddhism consider atheism to be acceptable. Doubt has been ingrained even in Indian spiritual culture.

India has produced some notable atheist politicians and social reformers.