Important Boundary Lines of India: India Border Line Name List, International Boundary

By BYJU'S Exam Prep

Updated on: November 14th, 2023

The important boundary lines of India and the world includes the 49th Parallel Line, McMahon line, Maginot line, Radcliffe line, etc. Out of these, the 49 parallel line lies between Northern USA and Canada, Maginot line lies between Germany and France, and the McMahon Line lies between China and India. The international boundary line is the space between two sovereign countries. International boundary lines play a critical role in depicting the separation between two countries and indicating the territories. A single national government enjoys its authority within its border. Though these boundaries resolve the land possession disputes, some of these boundaries have experienced war.

The important boundary lines of India include the McMahon line, Radcliffe line, etc. In this article, candidates can learn about the India border line name list, facts about the important boundaries of India, international boundaries, etc.

Important Boundary Lines of India

International boundaries are the geographical borders of legal or political jurisdictions such as two sovereign states, customs territories, and neighbouring countries. For instance, India possesses seven international boundaries with its neighbours. However, only a few are famous and important from the perspective of UPSC and other competitive exams.

List of International Boundary Lines PDF

The process of creating borders is known as boundary delimitation. One of the most important international boundary lines in the world is the Hindenburg line, i.e., the border between Germany and Poland.

List of Important Boundary Lines in the World

Here is a table of the important boundary lines in the world, along with their features and description and other information.

International Boundary Lines

Between Countries

Features/ Description

Blue Line

Lebanon and Israel

On 7 June 2000, the border demarcation between the two countries by the UN determined whether Israel had fully withdrawn from Lebanon.

Siegfried Line

Germany and France

Siegfried Lines were built by the Weimar Republic as an extension of the Hindenburg defensive line during World War 1. However, later the boundaries were later in the 1930s it was developed by the Third Reich of Germany.

49th Parallel

The USA and Canada

Located 49 degrees north of the equator, the 49th parallel forms the international border between Canada and the Northern USA (except Alaska).

38th Parallel

South Korea and North Korea

The central part of the Demilitarized zone between South and North Korea is demarcated by the 38th parallel.

31st Parallel

Iraq and Iran

The border between Iran and Iraq is marked by the 31st Northern latitude. Along with this, it demarcates the border between Mississippi and Louisiana.

25th Parallel

Mali and Mauritania

The 25th parallel marks the northmost section of the Mauritania-Mali border.

22nd Parallel

Sudan and Eqypt

It marks the boundaries between Sudan and Egypt.

20th Parallel

Sudan and Libya

The border between Sudan and Libya are marked by the 20th northern latitude.

17th Parallel

North and South Vietnam

The erstwhile North and South Vietnam are separated by the 17th latitude from the equator. The demarcated was based on the Geneva Accords of 1954. Later, it became irrelevant after Vietnam was unified in 1976.

UN Buffer Zone/Attila Line/Green Line

Turkish Cyprus and The Republic of Cyprus

Green line was established in 1964 as a demilitarized area under the patrolling of UNFICYP. In 1974, the boundaries were expanded after the ceasefire of 16.

Maginot Line

France and Germany

Before World war 2, the Maginot line was a defensive line at the French border towards Germany. After the invasion of France by Germany, the border was rendered obsolete.

Radcliffe Line

India and Pakistan

Sir Cyril Radcliffe demarcated the Radcliffe line to separate East and West Pakistan from India. At present, it includes Pakistan and Bangladesh.

Oder-Neisse Line

Germany and Poland

The Oder-Neisse Line is formed over the Lusatian and Oder rivers. It was formed in accordance with the Potsdam conference to separate Poland and Germany. But, later, in 1990, it was recognized by a unified Germany.

Mannerheim Line

Finland and Russia

The Mannerheim was formed by Finland as a defensive line during World war 2 against the Soviet Union for the Winter war.

Durand Line

Afghanistan and Pakistan

Sir Mortimer Durand delimited the line in 1893, with an agreement of the erstwhile amir of Afghanistan. Now, it is not recognised by present-day Afghanistan.

Hindenburg Line

Germany and Poland

During WW1, this boundary was used as the defensive line by German in the French territory. However, later in 1919, the boundary was considered irrelevant by the treaty of Versailles.

McMahon Line

India and China

McMahon line were drawn by Sir Henry McMahon in 1914 in consultation with representatives from Tibet. It is the de facto border tween the two countries.

49 Parallel Line between which Country

The border between the Canadian province of Manitoba, Saskatchewan, Alberta, and British Columbia to the north and the United States states of Minnesota, North Dakota, Montana, Idaho, and Washington to the south. It is the longest undefended border in the World. It is 5525 miles long, situated 49 degrees north of the equator.

Maginot Line

Named after the French Minister of War, Andre Maginot, the Maginot Line was formed to separate France and Germany. The principal aim of designing the line was to prevent an invasion. The Maginot line was filled with dozens of underground bunkers, minefields, fortresses, etc. But, being impenetrable and immobile, it failed to protect France from the attack of Germans. After the German attack on France, the French army had to isolate the Maginot line, and it became of little military importance after the incident.

Durand Line

The international boundary line between Pakistan and Afghanistan in South Asia is Durand Line. The boundary was established as an international border between Afghanistan and British India in 1893 to fix the diplomatic relations and trade between them. But it has been controversial and conflicts for these countries since Pakistan’s independence. In 2011, in a conflict between the two countries, 500 Taliban militants entered the Upper Dir area from Afghanistan. As a result of this, these Tabilan militants killed 30 Pakistani soldiers.

India Border Line Name List

Among 7 neighbouring countries with which India shares its International border, the two most important boundary lines of India are Radcliffe Line and McMahon Line. These are important for some specific reasons, which you can check below for a deeper understanding.

Radcliffe Line – International Boundary between India and Pakistan

The Radcliffe Line is also known as the international boundary line between Pakistan and India. It spread through Gujarat to the J&K border. Created on August 17, 1947, it divides British India into 3 parts – India, West Pakistan, and East Pakistan (present-day Bangladesh). Additionally, the border line between India and Pakistan passes through Jammu and Kashmir region and is called the Line of Control or LOC.

McMahon Line – Boundary Line between India and China

The international boundary line between India and China is called the McMohan Line, which spreads across the eastern border of Bhutan to the Himalayas till it reaches the great bend in the Brahmaputra river. It is named after Sir Henry McMahon who was the foreign secretary in British India and signed the bilateral agreement between Tibet and Britain at a conference in Shimla on 3rd July 1914. The McMohan line between India and China is 890 km or 550 miles in length.

Line of Actual Control

Line of Actual Control (LAC) is the borderline between India and China which was actually a ceasefire line initially but later turned into a borderline. It separates the territories of China and India.

Essential Facts about International Boundary Lines

The essential facts about the important boundary lines in the World are as follows:

  • Highest International Boundary – The boundary between Nepal and China is the highest international boundary that runs across the top point of Mount Everest. The border height above the seal level is 8848 metres, i.e., 29029 feet.
  • Longest International Boundary – The border between Canada and the United States is the longest. The length of the border is 5525 miles.
  • Most Lit-up International Boundary Line – As per NASA’s snapshot from the International Space Station, the most lit-up international boundary line is Radcliffe Line, i.e., the border between India and Pakistan.
  • Most Guarded International Boundary Line – Korean Demilitarized Zone between South and North Korea is the most guarded International boundary line in the World. It is approximately 250 km long and 4 km wide.
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