You are currently viewing Spain or Brazil: Which Country Does France Share Its Longest Border With?

Without further ado, here’s the answer: Brazil. Yes, France’s longest border is with Brazil, a country on an entirely different continent. Here’s why.

You’re probably starting to see the pattern with all these trick questions in our quizzes (I’ll have to switch things up to keep you on your toes for our next one haha).

So yes, France’s longest border isn’t with Spain, Belgium, or any other European nation, but instead with Brazil.

First of all, for those who are new to follow us and don’t know that we never make things up, here is the proof from Google:

France’s Longest Border

Yes, there is a relatively large French territory (overseas department and region) on the South American continent called French Guiana, which borders Brazil.

It’s the last remaining part of the mainland Americas that is still part of a European nation. As such, it’s legally just as French as metropolitan France back in Europe, unlike many overseas territories that have particular jurisdiction (for example Puerto Rico, which isn’t part of any US state and isn’t a state either).

There is no such distinction with French Guiana, except the obvious geographic one. Residents of French Guiana are full citizens of France. The French Guiana territory is fully a part of France.

which country does France share its longest border with
Location of French Guiana in South America.


So since it’s entirely part of France, that territory’s border with Brazil (730 km) means France’s longest border is there, not in Europe.


France’s Other Borders

France’s longest border in Europe (or let’s say Metropolitan France‘s longest border) is in fact with Spain, which narrowly beats out 4 other nations:

  • Spain (623 km)
  • Belgium (620 km)
  • Switzerland (573 km)
  • Italy (515 km)
  • Germany (448 km)

But the fact is, the longest border France shares really is with Brazil, via the Guianas region.


The Guianas Region

By the way, this is a fascinating part of the world, relatively remote and isolated. It would be an awesome spot for those who want to avoid overcrowded, touristy places.

The Guyanas region (named after the Guiana Shield, one of the 3 parts of the South American Plate) is not just comprised of that French territory, as 5 different European countries colonized 5 distinct Guianas:

  • French Guiana 
  • British Guiana (now the independent nation of Guyana)
  • Dutch Guiana (now the independent nation of Suriname)
  • Portuguese Guiana (now a region of Brazil)
  • Spanish Guiana (now a region of Venezuela)
which country does France share its longest border with
The 5 Guyanas (Photo Credit: ArnoldPlaton, Wikipedia)


The Guyanas region was one of the international trips that I had booked for 2019 in my quest to visit every country in the world (Guyana and Suriname). But, after a change of plans, I was able to cancel my non-refundable booking for free, thanks to a pro-tip I will share in an upcoming article.

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So there you have it: France’s longest border isn’t with a country in Europe, but instead with Brazil, thanks to the little-known French territory of French Guiana on the South American continent.


Are you surprised? Do you have any questions? Ask them in the comments below.

You can also read our previous quizzes:

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Featured image: Spanish/Brazilian flags (Photo credit: Wikipedia)

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Andrew D'Amours

Andrew is the co-founder of Flytrippers. He is passionate about traveling the world but also, as a former management consultant, about the travel industry itself. He shares his experiences to help you save money on travel. As a very cost-conscious traveler, he loves finding deals and getting free travel thanks to travel rewards points... to help him visit every country in the world (current count: 64/193 Countries, 47/50 US States & 9/10 Canadian Provinces).

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