Size and the Indian subcontinent

Detail

1. How big is India?

• Area: about 3.28 million sq km. The exact figure is 32,87,263 sq km. Britannica gives the same figure, 3,287,263 sq km [2].
• Share of world land: about 2.4% of the world's land area.
• Rank: India is the seventh largest country in the world. The six larger countries, from biggest to smallest, are:

Rank	Country	Continent
1	Russia	Europe–Asia
2	Canada	North America
3	USA	North America
4	China	Asia
5	Brazil	South America
6	Australia	Australia (Oceania)
7	India	Asia

• Exam trap: sources sometimes swap the USA and China at ranks 3 and 4. The swap happens because sources measure area in different ways, for example whether they count water bodies. NCERT puts the USA before China. India stays at rank 7 either way.
• Political units: India has 28 states and 8 Union Territories (current count) [2]. In 2020 Dadra and Nagar Haveli and Daman and Diu were merged into one UT. Some older government pages still show 9 UTs.
• Frontier: about one-third of India's frontier is coastline [2].
• Land border: 15,106.7 km [5].

• Coastline: 11,098.81 km, including the islands [4][5].

• Coastline update: the old figure of 7,516.6 km had been in use since the 1970s. The National Hydrographic Office (NHO) and the Survey of India (SoI) measured it again as 11,098.81 km. They used GIS (Geographic Information System: computer software that measures and maps places from digital map data) and high-resolution data. The Coastal Protection and Development Advisory Committee (CPDAC) accepted the new figure after every coastal state and UT agreed [4]. (NCERT: 7,516.6 km.)

2. Land share vs population share

• The contrast: India has 2.4% of the world's land but about 17–18% of its people.
• Census 2011 counted about 121 crore (1.21 billion) people, about 17.5% of the world population (NCERT).
• The UN reports that India passed China in April 2023 and became the world's most populous country. By the end of April 2023, India's population was expected to reach 1,425,775,850 [3].
• The UN puts India at about 17% of the world population, with about 1.4 billion people [3].

• The UN projects that India's population will peak around 2064 and then slowly fall. China's population peaked in 2022 at 1.426 billion [3].

• What this means: India has about 7 times more people than its land share would suggest. So a lot of pressure falls on its land, water, forests and farms.

• Population density means people per sq km. Census 2011: 382 persons per sq km (NCERT).

3. Size brings diversity

• A large area stretches across many latitudes, heights and rock types. So India has very different landscapes:
• Lofty mountains in the north: the Himalaya.
• Large rivers:
  • Himalayan rivers: Ganga and Brahmaputra. They are fed by snow and flow all year.
  • Peninsular rivers: Mahanadi, Godavari, Krishna and Kaveri. They are fed by rain and flow east into the Bay of Bengal.
• Forested hills: in the North-East and in the south (the Western Ghats).

• Marusthali: the sandy Thar Desert, mainly in western Rajasthan.

• "Mini-continent": Class 7 NCERT uses this term. It means a country so large and varied that it has the range of landforms, climates, soils and cultures you would normally find across a whole continent.

• Landforms in detail are covered in india-structure-physiography.

4. The Indian subcontinent

• Definition: a subcontinent is a large, separate part of a continent. Physical barriers set it apart from the rest of the continent, so it has its own geography and identity.
• Natural boundaries:

Direction	Boundary	Where
North	Himalayas	Jammu & Kashmir to Arunachal Pradesh; also Nepal and Bhutan
North-west	Hindukush and Sulaiman ranges	Afghanistan–Pakistan
North-east	Purvachal hills (Patkai, Naga, Manipur and Mizo hills)	India–Myanmar border
South	Indian Ocean	Arabian Sea, Bay of Bengal, Indian Ocean

• Which countries are in it:

Source	Countries counted
Class 11 NCERT	India, Pakistan, Nepal, Bhutan, Bangladesh
Class 7 NCERT	The five above plus Sri Lanka and Myanmar

• The name: India is the largest country here, so it gives its name to the subcontinent (Class 7 NCERT).
• Land neighbours: India shares land borders with Pakistan, China, Nepal, Bhutan, Bangladesh and Myanmar [2]. India also claims a 106 km border with Afghanistan in Pakistan-occupied Kashmir [6].

5. A mountain wall with gaps: the passes

• Barrier: the mountain wall was hard to cross, so the region stayed partly cut off from the rest of Asia.
• The isolation let the subcontinent develop its own regional identity in language, culture and history.
• People, armies and trade still came in through passes. A pass is a low gap in a mountain range that people can cross.

Pass	Location	What it connects
Khyber	Pakistan–Afghanistan (Spin Ghar, a spur of the Hindukush)	Peshawar to Kabul; a historic invasion route
Bolan	Balochistan, Pakistan (Brahui hills, near the Sulaiman range)	Indus plain to Quetta and Kandahar
Shipki La	Himachal Pradesh	India to Tibet; the Sutlej enters India near here
Nathu La	Sikkim	India to Tibet's Chumbi valley; a border trade point
Bomdi La	Arunachal Pradesh	Assam plain towards Tawang and Tibet

• Remember the pattern: Khyber and Bolan are in the north-west and are now in Pakistan. Shipki La, Nathu La and Bomdi La are Himalayan passes inside India.
• Passes in detail are covered in india-structure-physiography.

6. Map drill: two journeys across India

• North to south: Kashmir to Kanniyakumari. Kanniyakumari is the southern tip of the mainland, at about 8°4′N.

Order	Region crossed	What it is
1	Himalaya	Young fold mountains, snow-capped
2	Alluvial plain (Indus–Ganga)	Flat, fertile land built from river-laid silt
3	Vindhya–Satpura	Hill ranges marking the northern edge of the Peninsula
4	Deccan Plateau	Old, hard rock tableland; basalt lava in the north-west
5	Nilgiri	Hills where the Western and Eastern Ghats meet
6	Kerala coast	Coastal plain with lagoons and backwaters

• West to east: Jaisalmer to Imphal. Jaisalmer is in Rajasthan; Imphal is in Manipur.

Order	Region crossed
1	Thar Desert (Marusthali)
2	Aravalli range (old, worn-down fold mountains)
3	Ganga plain
4	Edge of the Chota Nagpur Plateau
5	Bengal delta (Ganga–Brahmaputra)
6	Meghalaya plateau or Barak valley
7	Manipur hills (Purvachal)

• Lesson: each journey crosses a desert, plains, plateaus, hills and coasts, which shows why India is called a "mini-continent".

Prelims Hooks

• India covers 32,87,263 sq km, about 2.4% of the world's land, and ranks 7th in area. In order, the six bigger countries are Russia, Canada, USA, China, Brazil and Australia.
• India has about 17% of the world population (UN) and became the most populous country in April 2023 [3].
• New official coastline: 11,098.81 km, measured by the NHO and the Survey of India. The old figure was 7,516.6 km [4].
• Land border: 15,106.7 km [5].
• Natural boundaries of the subcontinent: north–Himalayas; north-west–Hindukush and Sulaiman; north-east–Purvachal; south–Indian Ocean.
• Trap: Class 11 NCERT lists 5 subcontinent countries. Class 7 NCERT adds Sri Lanka and Myanmar. Afghanistan is in neither list.
• Pass–state pairs: Shipki La–Himachal Pradesh; Nathu La–Sikkim; Bomdi La–Arunachal Pradesh. Khyber and Bolan are in Pakistan.
• Marusthali is the Thar Desert. It is mostly in western Rajasthan.
• North to south, Kashmir to Kanniyakumari: Himalaya → alluvial plain → Vindhya–Satpura → Deccan → Nilgiri → Kerala coast.

Mains Points

• Land–population mismatch (GS-I and GS-III): India has 2.4% of the world's land and about 17% of its people [3].
• This means less farmland, water and forest per person, and more pressure on land from cities.

• It is also why food security, land-use planning and population policy matter so much.

• Size gives diversity (GS-I): India stretches across many latitudes and heights, and different areas have different rocks.

• This gives it mountains, plains, plateaus, deserts and coasts.

• The result is a wide range of farming, minerals, energy sources and tourism, but also many kinds of disaster, such as floods, droughts, cyclones and earthquakes.

• The subcontinent as one geographic unit (GS-I): mountains and the sea surround and partly isolate it.

• They shaped a shared culture and history in the region. Passes like the Khyber and Bolan were the routes for trade and invasions.

• The same geography still affects India's border security and trade links with its neighbours today, for example Nathu La trade and border road projects.

• Long frontier, big management job (GS-III): India must guard a 15,106.7 km land border and an 11,098.81 km coastline [4][5].

• Border fencing, coastal security and border-area development all need policing and infrastructure.