SSC
According to Census 2011, India's least densely populated district, Dibang Valley, is located in:
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Answer: Option A — Arunachal Pradesh
Detailed Solution
Dibang Valley is a district in Arunachal Pradesh. According to Census 2011, it was the least densely populated district in India, with a population density of only about 1 person per square kilometre.
About Dibang Valley district:
- It had a population of only about 8,000 people in 2011, spread over a large mountainous area of about 9,000 square kilometres.
- It is located in the north-eastern part of Arunachal Pradesh and shares an international border with China (Tibet).
- Its headquarters is Anini.
- In 2001, the old district was divided into Dibang Valley and Lower Dibang Valley.
- It is named after the Dibang river, a major tributary of the Brahmaputra, which flows through the district.
- It is home mainly to the Idu Mishmi tribe, who are known for their rich traditions and their close relationship with nature and wildlife.
Most of the district is covered with dense forests and snow-capped mountains, and it is rich in biodiversity. The Dibang Wildlife Sanctuary is located here.
The Dibang Multipurpose Project, a 2,880 MW hydroelectric project, is being built on the Dibang river. When complete, it will be the largest hydroelectric project in India.
Population density facts (Census 2011):
- India's average population density: 382 persons per square kilometre.
- Most densely populated state: Bihar (1,106 persons per sq km).
- Least densely populated state: Arunachal Pradesh (17 persons per sq km).
- Most densely populated Union Territory: Delhi (11,320 persons per sq km).
Least densely populated Union Territory: Andaman and Nicobar Islands (46 persons per sq km). (Ladakh, formed later, is even less dense.)
Most densely populated district: North East Delhi (about 37,000 persons per sq km).
Other facts about Arunachal Pradesh:
- It is the largest state in north-east India by area.
- It became a state on 20 February 1987.
Why not the other options?
- ✗Sikkim is the least populous state, but Dibang Valley in Arunachal is the least dense district.
- ✗Ladakh was part of Jammu and Kashmir in 2011; its districts were not the least dense.
- ✗Mizoram has many sparsely populated districts but not the least dense.
Quick tip
Remember: least densely populated district (Census 2011) = Dibang Valley, Arunachal Pradesh (about 1 person per sq km; Idu Mishmi; 2,880 MW Dibang project); most dense state = Bihar; least dense state = Arunachal.
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Population & Census — Preparation
This question tests your understanding of Population & Census, a key topic in the General Knowledge section. The detailed solution above uses a step-by-step approach to show the reasoning, and where available, a shortcut that helps you solve similar questions in under 90 seconds during the actual exam.
This topic covers India's population and the Census: population size and growth, density, sex ratio, literacy rate, urbanisation, and the most and least populous states, based on the Census of 2011, along with the basics of world population. Questions usually ask which state has the highest or lowest population, density, sex ratio or literacy, based on Census 2011. For example, Kerala had the highest literacy rate and sex ratio, and Bihar had the highest population density. The Census is conducted every ten years, so check whether newer data has been released before your exam. Practise the population and census questions below, written in the style of the general awareness sections of exams such as SSC, banking, railways, CUET GAT, MAH CET and CLAT. Each question comes with a detailed explanation that adds related facts, so every question helps you revise more than one point.