India's New Coastal Length: 11,098.81 km, and Why It Changed
India's coastline is now officially 11,098.81 km, replacing the 7,516.6 km figure measured in 1970. The land did not grow. The measurement method did. This piece explains the recalculation, the state-wise changes, what stays the same for maritime zones, and which number to write in the exam.
India's coastline is now officially 11,098.81 km, replacing the 7,516.6 km figure measured in 1970. The land did not grow. The measurement method did. This piece explains the recalculation, the state-wise changes, what stays the same for maritime zones, and which number to write in the exam.
The number you came for
India's coastal length is now 11,098.81 km. The earlier figure, 7,516.6 km, has been replaced. That old number came from a survey done back in 1970, and it sat in the India Year Book and in every coaching handout for over five decades.
The revision came from the National Hydrographic Office, and the Ministry of Home Affairs is the ministry that pushed it out into official use. Round it to about 11,099 km if you are writing fast in an answer. The jump is close to 47 percent over the old figure.
India did not gain territory. Nothing was annexed, nothing accreted. A ruler was simply held closer to the map.
Why a coastline grows when nobody adds land
This is the part most aspirants skip, and it is the part an interview board would actually poke at.
Coastline length depends entirely on the scale at which you measure it. Measure the Gujarat coast on a small-scale map and you draw a smooth arc past the Gulf of Kachchh. Measure it on a detailed chart and you are forced to trace every creek, every inlet, every bend around a mudflat. The line gets longer each time you zoom in. Geographers call this the coastline paradox, and it is why no coastline has one true length, only a length at a stated scale.
The 1970 exercise used coarse maps and a rough hand. The new one used electronic navigational charts at 1:250,000 scale, applied the same rule to every state, and counted the shores of tidal creeks and estuaries up to a defined limit inland. Same coast. Sharper pencil.
So when someone asks whether the old figure was wrong, the honest answer is no. It was measured differently. The new figure is more useful because it is consistent across states and because it matches what a patrol boat or a disaster manager actually has to cover.
Who gained the most
Gujarat stays at number one, and it is not close. Its coastline roughly doubled once the creeks of Kachchh and the Gulf of Khambhat were traced properly.
The headline change is West Bengal. A short 158 km coast became over 700 km, because the Sundarbans is mostly tidal creek and estuary, and the old method had ignored almost all of it. Look at that jump and you understand the whole revision in one line.
There is also a ranking change worth noting. Under the old figures, Andhra Pradesh sat second and Tamil Nadu third. In the revised set they swap, with Tamil Nadu ahead by a small margin. The island territories, Andaman and Nicobar plus Lakshadweep, together account for a large share of the national total, with the Andaman and Nicobar group contributing the bulk of it.
| State / UT | Old figure (km) | Revised figure (approx. km) |
|---|---|---|
| Gujarat | 1,214.7 | 2,341 |
| Tamil Nadu | 906.9 | 1,069 |
| Andhra Pradesh | 973.7 | 1,053 |
| Maharashtra | 652.6 | 878 |
| West Bengal | 157.5 | 722 |
| Kerala | 569.7 | 600 |
| Odisha | 476.7 | 578 |
| Karnataka | 280.0 | 313 |
| Goa | 101.0 | 160 |
What the new figure does not change
This is where careless answers lose marks.
A longer measured coastline does not extend India's territorial sea, contiguous zone or exclusive economic zone. Those are measured from baselines notified under the Maritime Zones Act, 1976, and baselines are drawn as straight or normal lines from specified points, not by following every creek. The 12 nautical mile territorial sea and the 200 nautical mile EEZ are untouched. No new sea, no new fishing rights, no new claim.
What it does change is the administrative picture. Coastal security planning, the number of vulnerable stretches to be patrolled, cyclone and tsunami preparedness, Coastal Regulation Zone mapping, mangrove accounting, blue economy estimates. All of these work off the physical shoreline, not off baselines. When you tell the Coast Guard the coast is 47 percent longer than the old file said, staffing and asset plans have to be rewritten. The same exercise also revised India's offshore island count upward, to 1,382.
How to use this in Prelims and Mains
For Prelims, memorise 11,098.81 km and remember that the old figure was 7,516.6 km with the mainland at 5,422.6 km and the islands at 2,094 km. UPSC has a habit of asking about a changed figure in the year or two after it changes, and a well-set question could test whether you know both numbers and which one is current. Keep Gujarat as the longest coastline and Lakshadweep as the smallest among coastal states and UTs with a coast.
For Mains, do not just drop the number. One clause on why it changed is what separates a fact from an argument. Something like: India's coastline, revised in the recent hydrographic recalculation from 7,516.6 km to 11,098.81 km, expands the operational task in coastal security without altering maritime zones defined from baselines. That sentence works in an internal security answer, a disaster management answer and a blue economy answer. Three uses, one line.
And if a question asks whether the increase reflects a territorial gain, say no, plainly, then explain the scale effect. Examiners notice candidates who refuse to be impressed by a big number.
FAQs
1. Which Indian state has the longest coastline now?
Gujarat, with roughly 2,341 km in the revised figures, nearly double its old 1,214.7 km. It held the top spot under the old measurement too.
2. What was India's old coastline figure and when was it measured?
India's coastline was earlier given as 7,516.6 km, made up of 5,422.6 km of mainland and 2,094 km of island coast. That measurement dates from 1970 and remained in official publications until the recent recalculation.
3. Does the longer coastline give India a bigger EEZ?
No. The exclusive economic zone and territorial sea are measured from notified baselines under the Maritime Zones Act, 1976, and those baselines have not changed. Only the measured physical shoreline is longer.
4. Why did West Bengal's coastline increase so much?
Because most of its coast is the Sundarbans, a maze of tidal creeks and estuaries that the earlier coarse-scale survey largely smoothed over. Counting those creek shores took it from about 158 km to over 700 km.
5. How many islands does India have?
The hydrographic exercise puts India's offshore islands at 1,382, a figure higher than the older counts used in textbooks. Most lie in the Andaman and Nicobar group.
6. Which figure should I write in the UPSC exam?
Write 11,098.81 km as the current coastal length, and mention the older 7,516.6 km only to show you know it was revised. Adding one line on why the number changed is worth more than the number alone.