Indian Geography
🔒 Log in to trackLocation, extent, neighbours and islands
🔒 Log in to trackIndia lies entirely in the Northern and Eastern hemispheres. The mainland extends from 8°4'N to 37°6'N latitude and 68°7'E to 97°25'E longitude. Area is about 32.87 lakh sq km (3.287 million sq km) — roughly 2.4% of the world's land area, making India the 7th largest country.
Key location facts
| Fact | Answer |
|---|---|
| Tropic of Cancer (23.5°N) passes through | 8 states: Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura, Mizoram |
| Standard Meridian (IST) | 82°30'E, passes near Mirzapur (UP); IST = GMT + 5:30 |
| States the Standard Meridian crosses | Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Odisha, Andhra Pradesh |
| Southernmost point | Indira Point (Great Nicobar); mainland tip = Kanyakumari |
| Largest / smallest state (area) | Rajasthan / Goa |
| State with longest coastline | Gujarat |
| Coastline | 7,516.6 km (long-used figure; a 2024-25 re-measurement by a finer method reported about 11,099 km) |
| Land frontier | about 15,200 km |
Neighbours and land border length (MHA figures)
| Neighbour | Border (km) | Remember |
|---|---|---|
| Bangladesh | 4,096.7 | Longest border |
| China | 3,488 | McMahon Line in the east |
| Pakistan | 3,323 | Radcliffe Line (1947) |
| Nepal | 1,751 | Open border |
| Myanmar | 1,643 | |
| Bhutan | 699 | |
| Afghanistan | 106 | Shortest border |
Water bodies around India
- Palk Strait and Gulf of Mannar separate India from Sri Lanka; Adam's Bridge (Ram Setu) lies between them.
- Ten Degree Channel separates Andaman from Nicobar; Duncan Passage separates South Andaman from Little Andaman.
- Eight Degree Channel separates Minicoy (India) from the Maldives; Nine Degree Channel separates Minicoy from the main Lakshadweep group.
- Barren Island (Andaman Sea) is India's only active volcano; Narcondam is a dormant volcano.
- Andaman & Nicobar are the peaks of a submerged mountain chain; Lakshadweep islands are coral (atoll) islands.
Detailed notes
Where India sits on the map
India lies wholly in the Northern and Eastern hemispheres. The mainland runs from 8°4'N to 37°6'N latitude and from 68°7'E to 97°25'E longitude. The Tropic of Cancer (23.5°N) cuts the country roughly into two halves and passes through 8 states (west to east): Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura and Mizoram. Odisha, Bihar and Uttar Pradesh are the classic traps - the Tropic misses all three.
Size, area and the Standard Meridian
India's area is about 32.87 lakh sq km (3.28 million sq km) - only 2.4% of the world's land, yet the country holds roughly 17.5% of the world's people (Census 2011). By area India is the 7th largest country. Rajasthan is the largest state and Goa the smallest; Madhya Pradesh is second largest. Because the Sun rises about two hours earlier in Arunachal Pradesh than in Gujarat, the country needs one reference line: the Standard Meridian of India, 82°30'E, which passes near Mirzapur in Uttar Pradesh. It crosses UP, Madhya Pradesh, Chhattisgarh, Odisha and Andhra Pradesh. Indian Standard Time is always GMT + 5:30 (82.5 x 4 minutes = 330 minutes).
Land neighbours and border lengths
India has 7 land neighbours (Afghanistan, Bangladesh, Bhutan, China, Myanmar, Nepal, Pakistan) plus two maritime neighbours - Sri Lanka and the Maldives. Border lengths (Home Ministry figures):
| Neighbour | Border | Neighbour | Border |
|---|---|---|---|
| Bangladesh | 4,096.7 km (longest) | Myanmar | 1,643 km |
| China | 3,488 km | Bhutan | 699 km |
| Pakistan | 3,323 km | Afghanistan | 106 km (shortest) |
| Nepal | 1,751 km | ||
| States touching each neighbour: Bangladesh 5 (West Bengal, Assam, Meghalaya, Tripura, Mizoram); China 5 (Ladakh/J&K, Himachal Pradesh, Uttarakhand, Sikkim, Arunachal Pradesh); Nepal 5 (Uttarakhand, UP, Bihar, West Bengal, Sikkim); Myanmar 4 (Arunachal Pradesh, Nagaland, Manipur, Mizoram); Bhutan 4 (Sikkim, West Bengal, Assam, Arunachal Pradesh). |
Sea around three sides
The Arabian Sea washes the west coast, the Bay of Bengal the east coast, and the Indian Ocean lies to the south - hence the name of the ocean itself comes from India. The total coastline (mainland plus islands) was long quoted as 7,516.6 km; a 2024 re-measurement on more detailed maps gives about 11,098 km. On both counts Gujarat has the longest state coastline. The Palk Strait and the Gulf of Mannar separate India from Sri Lanka, and the chain of shoals called Adam's Bridge (Ram Setu) lies between them.
The island groups
The Andaman and Nicobar Islands are about 572 islands (only around 38 inhabited) - the peaks of a submerged mountain chain. The Ten Degree Channel splits the Andaman group from the Nicobar group. Barren Island in the Andaman Sea is India's only active volcano; Narcondam nearby is dormant. Indira Point (Great Nicobar) is the southernmost point of India, while the mainland tip is Kanyakumari; the northernmost point is Indira Col in the Siachen area of Ladakh. Lakshadweep in the Arabian Sea is a group of coral islands (atolls) with its capital at Kavaratti; Minicoy is its southernmost island. Around them: the Nine Degree Channel separates Minicoy from the main Lakshadweep group, and the Eight Degree Channel separates Minicoy from the Maldives. The Duncan Passage lies between South Andaman and Little Andaman; the Coco Channel between North Andaman and Myanmar's Coco Islands; the Great Channel between Great Nicobar and Sumatra (Indonesia).
Quick revision
- Lat 8°4'N to 37°6'N; long 68°7'E to 97°25'E; Tropic of Cancer through 8 states (no Odisha, Bihar, UP).
- Area 32.87 lakh sq km = 2.4% of world land = 7th largest; Rajasthan largest state, Goa smallest, MP second.
- Standard Meridian 82°30'E (Mirzapur); IST = GMT + 5:30; crosses UP, MP, Chhattisgarh, Odisha, AP.
- Longest border Bangladesh (4,096.7 km), shortest Afghanistan (106 km); 7 land + 2 maritime neighbours.
- Indira Point = southernmost point, Kanyakumari = mainland tip, Indira Col = northernmost.
- Channels: Ten Degree (Andaman|Nicobar), Nine Degree (Minicoy|Lakshadweep), Eight Degree (Minicoy|Maldives).
Types of questions asked
Every way this subtopic shows up in exams — how to recognise it, the formula or logic to use, and a solved example.
Type 1: States on the Tropic of Cancer / Standard Meridianvery common3 practice Q
'Which state does NOT lie on the Tropic of Cancer?', 'The Standard Meridian passes through…', or a list of states to check.
- Tropic of Cancer (23.5°N), west to east: Gujarat, Rajasthan, MP, Chhattisgarh, Jharkhand, West Bengal, Tripura, Mizoram (8 states).
- Standard Meridian (82°30'E) crosses UP, MP, Chhattisgarh, Odisha, Andhra Pradesh (5 states); reference town Mirzapur.
- In a NOT-question, strike every state from the list; the one left is the answer. Traps: Odisha, Bihar and UP are not on the Tropic; Jharkhand is not on the Meridian.
Example: The Standard Meridian of India does NOT pass through which state? (a) Uttar Pradesh (b) Chhattisgarh (c) Odisha (d) Jharkhand
(d) Jharkhand. The 82°30'E line crosses UP, MP, Chhattisgarh, Odisha and Andhra Pradesh; Jharkhand lies just east of it.
Type 2: Neighbours: border length and states touching each countryvery common4 practice Q
'Longest/shortest border…', 'Which state does NOT border Nepal/Myanmar?', 'Mizoram shares borders with…'.
- Border order (MHA): Bangladesh > China > Pakistan > Nepal > Myanmar > Bhutan > Afghanistan.
- Keep the state lists: Nepal (Uttarakhand, UP, Bihar, WB, Sikkim), Bhutan (Sikkim, WB, Assam, Arunachal), Myanmar (Arunachal, Nagaland, Manipur, Mizoram), Bangladesh (WB, Assam, Meghalaya, Tripura, Mizoram).
- Tick each option against the list; a state missing from the list is the odd one.
Example: Which neighbouring country shares the shortest land border with India?
Afghanistan - about 106 km, touching Ladakh (as per India's official map). The longest is with Bangladesh (4,096.7 km).
Type 3: Channels, straits and island groupsvery common4 practice Q
A channel, strait or passage is named and the two land areas it separates are asked, or an island fact (volcano, coral, capital).
- Arabian Sea side: Nine Degree = Minicoy | main Lakshadweep; Eight Degree = Minicoy | Maldives.
- Bay of Bengal side: Ten Degree = Andaman | Nicobar; Duncan Passage = South Andaman | Little Andaman; Coco Channel = North Andaman | Coco Islands (Myanmar); Great Channel = Great Nicobar | Sumatra.
- Palk Strait and Gulf of Mannar separate India from Sri Lanka.
Example: The Eight Degree Channel separates:
Minicoy (India) from the Maldives. The Nine Degree Channel lies further north, between Minicoy and the rest of Lakshadweep.
Type 4: Extreme points and size superlativescommon3 practice Q
'Southernmost point of India', 'largest/smallest state by area', 'India's share of the world's land'.
- Extremes: Indira Col (north), Indira Point in Great Nicobar (south), Kanyakumari (mainland south tip).
- Size: 32.87 lakh sq km, 2.4% of world land, 7th largest country.
- States: Rajasthan largest, MP second, Goa smallest.
Example: Which is the largest state of India by area?
Rajasthan (about 3.42 lakh sq km). Madhya Pradesh is second; Goa is the smallest.
Type 5: Latitude-longitude extent and time differenceoccasional3 practice Q
Questions on India's lat/long extent, why IST is GMT + 5:30, or the time gap between the east and west ends.
- The Earth turns 360° in 24 hours, so 1° = 4 minutes.
- IST: 82.5° x 4 = 330 minutes = 5 h 30 min ahead of GMT.
- East-west spread of India is about 29°, so the Sun rises about 2 hours earlier in Arunachal than in Gujarat.
Example: Why is Indian Standard Time 5 h 30 min ahead of GMT?
Because the Standard Meridian is 82°30'E. 82.5 x 4 min = 330 min = 5 h 30 min.
Shortcut tricks
⚡ Tropic of Cancer states — 'GRM CJ WTM'
West to east: Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura, Mizoram. Read it as 'Great Royal Mango, Cool Juice, With Tasty Mangoes'. Odisha and Bihar are the usual traps — the Tropic misses both.
Example: Does the Tropic of Cancer pass through Odisha?
No. It passes through Jharkhand and West Bengal to the north of Odisha.
⚡ Border order: 'Big Cats Prowl Near My Big Area'
Longest to shortest border — Bangladesh > China > Pakistan > Nepal > Myanmar > Bhutan > Afghanistan.
Example: With which neighbour does India share its shortest land border?
Afghanistan (about 106 km, in PoK area).
⚡ Channel numbers go down as you go south-west
Ten Degree (Andaman | Nicobar) → Nine Degree (Minicoy | Lakshadweep) → Eight Degree (Minicoy | Maldives). The Andaman group has the bigger number.
Where students lose marks
Taking Kanyakumari as India's southernmost point — it is Indira Point in Great Nicobar; Kanyakumari is the mainland tip.
Answering China for the longest land border — it is Bangladesh.
Placing the Standard Meridian at Prayagraj — the reference town is Mirzapur (82°30'E).
Practice sets — 20 questions
Sets of 10, mixed across the question types above. Each answer comes with a step-by-step explanation.
Topic test · 10 questions
Suggested time 4 min · wrong answers go to your mistake notebook automatically.