International Borders & Boundary Lines of Countries
International borders or boundary lines define the geographical limits between two or more countries. These boundaries play a crucial role in political administration, security, trade, and international relations.
| Borders / Boundary Lines | Between Two Countries |
|---|---|
| Durand Line | Afghanistan & Pakistan |
| Hindenburg Line | Germany & Poland |
| Mason–Dixon Line | Line of demarcation between four states in the United States |
| Mannerheim Line | Russia–Finland border |
| MacMahon Line | India & China |
| Medicine Line | Canada & United States |
| Oder–Neisse Line | Poland & Germany |
| Radcliffe Line | India & Pakistan |
| Siegfried Line | Germany–France border |
| 17th Parallel | North Vietnam & South Vietnam |
| 26th Parallel South | Africa, Australia & South America |
| 30th Parallel | Between the Equator & the North Pole |
| 38th Parallel | North Korea & South Korea |
| 42nd Parallel North | New York – Pennsylvania border |
| 49th Parallel | USA & Canada |
Last updated: —
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