In India, how many States share the coastline?

1. Physiographic Divisions of India (basic)

Welcome! To master the geography of India, we first need to look at the 'big picture.' Physiography is the study of the physical features and landforms of the Earth's surface. Because of its massive size and complex tectonic history, India is a land of incredible physical diversity Geography of India, Physiography. You can experience everything from the highest mountain ranges in the world to vast fertile plains and arid deserts within the same country INDIA PHYSICAL ENVIRONMENT, India — Location, p.5.

According to standard geographical classifications, India is divided into six distinct Physiographic Divisions. Each region has a unique relief, climate, and geological structure:

• The Himalayan Mountains: The young, fold mountains in the North.
• The Northern Plains: Fertile lands formed by the Indus, Ganga, and Brahmaputra rivers.
• The Peninsular Plateau: The oldest landmass of India, composed of igneous and metamorphic rocks.
• The Indian Desert: The arid region also known as the Thar Desert.
• The Coastal Plains: The narrow strips of land flanking the Peninsular plateau along the Arabian Sea and Bay of Bengal.
• The Islands: The Lakshadweep and Andaman & Nicobar groups.

CONTEMPORARY INDIA-I, Physical Features of India, p.7

Since our journey focuses on Coastal Geography, we pay special attention to the shoreline. India possesses a coastline of over 7,500 km (including islands). This coastline is shared by nine states: Gujarat, Maharashtra, Goa, Karnataka, and Kerala on the western side; and Tamil Nadu, Andhra Pradesh, Odisha, and West Bengal on the eastern side. Distinguishing between these states and Union Territories is crucial for accuracy in your UPSC preparation.

Sources: Geography of India, Physiography, p.N/A; INDIA PHYSICAL ENVIRONMENT, India — Location, p.5; CONTEMPORARY INDIA-I, Physical Features of India, p.7

2. Western vs. Eastern Coastal Plains (intermediate)

To understand the Indian coastline, we must look at it through the lens of geological history. Both the Western and Eastern coastal plains were formed during the Eocene Period due to the faulting and subsidence of the landmass into the Arabian Sea and the Bay of Bengal Geography of India, Majid Husain, Physiography, p.63. However, they are not mirror images of each other. The Western Coastal Plain is primarily a submerged coast (think of the legendary city of Dwaraka, which now lies underwater). This submergence makes the western plain narrow and provides deep-water natural conditions perfect for natural ports like Kandla, Mumbai, and Mangalore INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Structure and Physiography, p.14.

In contrast, the Eastern Coastal Plain is largely an emergent coast, characterized by broad, level plains formed by the massive alluvial deposits of rivers like the Mahanadi, Godavari, and Krishna Geography of India, Majid Husain, Physiography, p.65. Because the sea here is relatively shallow and the coast is expanding seaward through delta formation, natural deep-water harbors are rarer compared to the west. The regional nomenclature also differs: the west is divided into the Konkan, Kannad, and Malabar coasts, while the east is split into the Northern Circar and the Coromandel Coast CONTEMPORARY INDIA-I, Geography Class IX, Physical Features of India, p.13.

Feature	Western Coastal Plain	Eastern Coastal Plain
Width	Narrow strips	Wide and level
Nature	Submerged (North) & Emergent (South)	Emergent
Geomorphic Features	Estuaries and Backwaters (Kayals)	Large Deltas
Port Suitability	Excellent for Natural Ports	Mostly Artificial/Shallow Ports

Sources: Geography of India (Majid Husain), Physiography, p.63, 65; INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Structure and Physiography, p.14; CONTEMPORARY INDIA-I, Geography Class IX, Physical Features of India, p.13; Physical Geography by PMF IAS, Major Landforms and Cycle of Erosion, p.224

3. Total Length and Extent of India's Coastline (intermediate)

When we look at the map of India, its peninsular shape is one of its most defining features. India possesses a massive coastline that serves as a gateway for trade, a source of livelihood, and a critical component of its national security. To understand its extent, we must distinguish between the mainland coastline and the total coastline, which includes our offshore island territories.

According to the latest data, India has a land boundary of about 15,200 km, but the total length of the coastline (including the mainland, Lakshadweep Islands, and the Andaman and Nicobar Islands) is 7,516.6 km Contemporary India-I, India Size and Location, p.2. This vast stretch is shared by nine coastal states: Gujarat, Maharashtra, Goa, Karnataka, and Kerala on the western coast; and Tamil Nadu, Andhra Pradesh, Odisha, and West Bengal on the eastern coast. While the mainland portion measures approximately 5,422 km, it is the addition of the island territories that pushes the figure over the 7,500 km mark Exploring Society: India and Beyond, Geographical Diversity of India, p.19.

Feature	Details
Total Coastline Length	7,516.6 km (Mainland + Islands)
Number of Coastal States	9 (Gujarat to West Bengal)
Major Island Groups	Andaman & Nicobar (Bay of Bengal) and Lakshadweep (Arabian Sea)

Geographically, India's mainland extends from latitude 8° 4' N to 37° 6' N Geography of India, India–Political Aspects, p.28. As the land tapers south of 22° N latitude, it divides the Indian Ocean into two distinct bodies of water: the Arabian Sea to the west and the Bay of Bengal to the east Contemporary India-I, India Size and Location, p.2. Within these waters lie hundreds of islands—572 in the Bay of Bengal and 43 in the Arabian Sea—many of which are uninhabited but contribute significantly to India's total maritime extent Geography of India, Physiography, p.66.

Sources: Contemporary India-I, India Size and Location, p.2; Exploring Society: India and Beyond, Geographical Diversity of India, p.19; Geography of India, India–Political Aspects, p.28; Geography of India, Physiography, p.66

4. India's Maritime Zones and UNCLOS (exam-level)

To understand India's maritime boundaries, we must look at the United Nations Convention on the Law of the Sea (UNCLOS), often referred to as the "Constitution of the Oceans." India ratified this in 1995, but our domestic legal framework was established even earlier via the Maritime Zones Act of 1976. A critical point for your exam is that all minerals, oil, and sea-wealth found within these zones vest in the Union (Central Government); individual coastal states like Gujarat or Kerala cannot claim jurisdiction over these offshore resources Indian Polity, M. Laxmikanth, p.551.

The maritime zones are measured from a baseline (usually the low-water line along the coast). As we move away from the shore, the level of control India exercises changes across three primary zones:

Zone	Distance	Nature of Rights
Territorial Sea	12 Nautical Miles (nm)	Full Sovereignty: India has total control over the water, seabed, and even the airspace above it Indian Polity, M. Laxmikanth, p.551.
Contiguous Zone	24 Nautical Miles (nm)	Limited Jurisdiction: India can enforce laws specifically related to customs, fiscal, immigration, and sanitation.
Exclusive Economic Zone (EEZ)	200 Nautical Miles (nm)	Resource Rights: India has the exclusive right to exploit natural resources (fishing, oil, minerals) and generate energy Indian Polity, M. Laxmikanth, p.551. However, other ships enjoy "freedom of navigation."

This maritime expanse is the backbone of the Indian economy. Our 7,500 km coastline—shared across 13 states and Union Territories—handles 90% of our EXIM (Export-Import) trade by volume Indian Economy, Vivek Singh, p.419. Strategic locations like the Deendayal Port (Kandla) in the Gulf of Kuchchh are vital for receiving petroleum and fertilizers to fuel our hinterland India People and Economy, NCERT, p.90. Understanding these zones is not just a geography lesson; it is the legal foundation of India's blue economy and energy security.

Sources: Indian Polity, M. Laxmikanth, Rights and Liabilities of the Government, p.551; Indian Economy, Vivek Singh, Infrastructure and Investment Models, p.419; INDIA PEOPLE AND ECONOMY, NCERT, International Trade, p.90

5. Major Sea Ports and Coastal Infrastructure (exam-level)

India’s maritime geography is anchored by a vast 7,517 km coastline, providing a natural advantage for global trade. This coastline is shared by nine states: Gujarat, Maharashtra, Goa, Karnataka, and Kerala on the western front, and Tamil Nadu, Andhra Pradesh, Odisha, and West Bengal on the eastern front INDIA PEOPLE AND ECONOMY, TEXTBOOK IN GEOGRAPHY FOR CLASS XII (NCERT 2025 ed.), International Trade, p.89. Currently, India manages its maritime traffic through 12 Major Ports (equally split with 6 on each coast) and approximately 200 non-major ports. This infrastructure is the backbone of our economy, handling nearly 95% of India's trade by volume and 68% by value Indian Economy, Nitin Singhania (ed 2nd 2021-22), Infrastructure, p.460.

A fundamental concept in port geography is the Hinterland—the land area that provides the goods for export and consumes the imports flowing through a specific port. For example, Mumbai Port, the country's largest natural harbor, serves a massive hinterland including Maharashtra, Madhya Pradesh, Gujarat, and parts of North India. To relieve the immense pressure on Mumbai, the Jawaharlal Nehru Port (Nhava Sheva) was developed as a satellite port INDIA PEOPLE AND ECONOMY, TEXTBOOK IN GEOGRAPHY FOR CLASS XII (NCERT 2025 ed.), International Trade, p.90. Efficiency at these ports is often measured by Average Turnaround Time (ATT), which tracks how long a ship stays at the port from entry to exit.

Despite this potential, Indian exports often face a connectivity bottleneck. Raw materials frequently travel long distances from the coast to the hinterland and back, increasing costs. To address this, the government launched the Sagarmala Project. This initiative shifts the focus from simple port development to port-led development, integrating coastal cities with high-quality road and rail networks, Coastal Economic Zones (CEZs), and smart infrastructure to make Indian goods more competitive globally Indian Economy, Vivek Singh (7th ed. 2023-24), Infrastructure and Investment Models, p.420.

Feature	West Coast Ports	East Coast Ports
Geology	Generally characterized by submerged coasts; more natural harbors.	Characterized by emergent coasts; often require more dredging.
Major Port Count	6 (e.g., Kandla, Mumbai, JNPT, Mormugao, Mangalore, Kochi).	6 (e.g., Tuticorin, Chennai, Ennore, Visakhapatnam, Paradip, Haldia/Kolkata).
Key Advantage	Closer to routes for Middle East, Europe, and North America.	Gateway to South East Asia and East Asian markets.

Sources: INDIA PEOPLE AND ECONOMY, TEXTBOOK IN GEOGRAPHY FOR CLASS XII (NCERT 2025 ed.), International Trade, p.89-90; Indian Economy, Nitin Singhania (ed 2nd 2021-22), Infrastructure, p.460; Indian Economy, Vivek Singh (7th ed. 2023-24), Infrastructure and Investment Models, p.419-420

6. Administrative Units: Coastal States and UTs (basic)

To understand India's geography, we must look at how its vast 7,516.6 km coastline is administratively managed. India’s shoreline is distributed across nine states and four Union Territories (UTs). Distinguishing between these is a common requirement in civil services exams, as states have specific constitutional powers over their land and territorial waters that differ from UTs, which are governed more directly by the Union Introduction to the Constitution of India, TERRITORY OF THE UNION, p.73.
The nine coastal states are divided between the Western and Eastern coasts. On the Western Coast (Arabian Sea), we find five states: Gujarat (which boasts the longest coastline), Maharashtra, Goa (the smallest coastal state), Karnataka, and Kerala. Moving to the Eastern Coast (Bay of Bengal), there are four states: Tamil Nadu, Andhra Pradesh, Odisha, and West Bengal. It is important to remember that while many states might be near the sea, only these nine have a direct physical border with the ocean.
In addition to the states, four Union Territories share the coastline. Two of these are island territories: the Andaman and Nicobar Islands in the Bay of Bengal and Lakshadweep in the Arabian Sea Geography of India, Physiography, p.66. The other two are mainland UTs: Puducherry on the east coast and the merged territory of Dadra and Nagar Haveli and Daman and Diu on the west coast Introduction to the Constitution of India, TERRITORY OF THE UNION, p.73. Understanding this 9 + 4 distribution is fundamental to mastering India's maritime administrative structure.

Coastline	States	Union Territories
Western Coast	Gujarat, Maharashtra, Goa, Karnataka, Kerala	Dadra & Nagar Haveli and Daman & Diu, Lakshadweep
Eastern Coast	West Bengal, Odisha, Andhra Pradesh, Tamil Nadu	Puducherry, Andaman & Nicobar Islands

Sources: Introduction to the Constitution of India, TERRITORY OF THE UNION, p.73; Geography of India, Physiography, p.66

7. Solving the Original PYQ (exam-level)

Now that you have mastered the physical geography of the Indian Peninsula, this question tests your ability to apply that spatial awareness to administrative boundaries. The building blocks you've learned—specifically the division between the Western Coastal Plains and the Eastern Coastal Plains—converge here. To answer this correctly, you must visualize the map from the Rann of Kutch down to Kanyakumari and back up to the Sundarbans, distinguishing clearly between States and Union Territories, as UPSC frequently tests this specific administrative distinction.

Let’s walk through the coastline systematically to verify the count. Starting on the west coast and moving south, we have Gujarat, Maharashtra, Goa, Karnataka, and Kerala (5 states). Rounding the tip and moving up the east coast, we encounter Tamil Nadu, Andhra Pradesh, Odisha, and West Bengal (4 states). Summing these up leads us directly to the correct answer: (C) 9. The critical reasoning cue here is to exclude coastal Union Territories like Puducherry or Daman and Diu, as the question specifically asks for "States." As highlighted in the BSI ENVIS Resource Centre, official documentation maintains this clear separation between the nine states and various coastal UTs.

UPSC often sets traps with options like (B) 8 or (D) 10 to catch students who might overlook a smaller state like Goa or mistakenly include a Union Territory in their mental tally. Selecting (A) 7 is a common error if one fails to account for the coastal reaches of Gujarat in the north-west or West Bengal in the north-east. Success in geography PYQs depends on this precise mental mapping—ensuring you count every administrative unit from the Arabian Sea to the Bay of Bengal without conflating different legal categories.