Census Challenges for Isolated Tribes in India's Andaman and Nicobar Islands
As India prepares for its next national census in 2027, officials in the remote Andaman and Nicobar Islands face a difficult question: how to count Indigenous groups that actively avoid outside contact.
The Sentinelese, a hunter-gatherer people living on the densely forested North Sentinel Island, are at the center of this dilemma. Known for using bows and arrows to repel outsiders, their resistance has raised concerns about whether census efforts should even be attempted.
“Conducting a census among the Sentinelese serves no real purpose,” says Manish Chandi, who once served on the research advisory board of the Andaman and Nicobar Tribal Research and Training Institute. “Safeguarding the island’s ecosystem and respecting the tribe’s isolation is far more crucial than obtaining a population figure,” he told the Hindustan Times.
India’s last census took place in 2011. Since then, a 5-kilometer exclusion zone has been enforced around North Sentinel Island. This approach aims to minimize contact, shielding the tribe from diseases they lack immunity against while preserving their independence.
The World’s Most Isolated Community
Past census attempts were less intrusive, with officials observing from boats at a distance. In 1921, RF Lowe, who oversaw the count, noted that direct interaction was avoided due to the Sentinelese’s hostility.
The 2001 census recorded 39 individuals spotted on the beach, while the 2011 estimate dropped to 15. Both numbers are considered rough approximations based on distant observations. According to London-based advocacy group Survival International, the population could range between 50 and 150.
Descendants of migrants believed to have arrived from Africa over 50,000 years ago, the Sentinelese rely on traditional tools for hunting and gathering. Anthropologists regard them as one of the most isolated societies in existence.
When the British established a penal colony in the Andamans in 1858, tribal populations were estimated at 5,000. Within decades, disease outbreaks—including measles, influenza, and syphilis—devastated these communities.
No officials have visited the 59 sq km island since 2014, not even after the Sentinelese killed four intruders, among them 26-year-old American John Allen Chau. He was reportedly shot with arrows in 2018 after illegally entering the island.
Threats from Outside Contact
Despite their hostility, outsiders continue attempting contact. In March, a 24-year-old from Arizona was detained after recording his unauthorized journey to the island while carrying a soft drink and a coconut.
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