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Countries with the Longest Coastline Bordering Each Other

Name the countries with the longest coastline that border each other.
Methodology: Each country is ranked 1-196 based on coastline length
An average rank between bordering countries was calculated, these are the lowest averages overall
NOT counting borders formed via external territories!!
Source for coastline data
Quiz by
Stewart
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Last updated: October 9, 2025
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First submittedMay 9, 2019
Times taken28,149
Average score82.6%
Rating4.89
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Avg
Countries
2
Canada
United States
5
Norway
Russia
6.5
China
Russia
8
Mexico
United States
10
Indonesia
Papua New Guinea
12
Brazil
France
14
China
India
14
Norway
Sweden
15
Argentina
Chile
16
Argentina
Brazil
Avg
Countries
16
China
Myanmar
16.5
Indonesia
Malaysia
18
Brazil
Venezuela
18
China
Vietnam
18
Finland
Russia
18.5
France
Italy
19
India
Myanmar
21
Finland
Norway
21.5
Greece
Turkey
23
France
Spain
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30 Comments
scambigol
+6
Level 80
May 12, 2019
nice! you could also make versions where the border has to be on the coast or not on the coast. Eg Brazil-Venezuela border isn't on the coast, Mexico-United States is
Stewart
+2
Level 68
May 12, 2019
Interesting! I'll explore the idea, thank you!
CosmicCalamity
+1
Level 74
Oct 12, 2025
That quiz already exists.
Cooldude185
+4
Level 60
Oct 31, 2025
This was 6 years ago..
Type0Negative
+1
Level 74
Apr 5, 2020
couldn't think of Greece and Turkey, typed them with 6 seconds left, great quiz
MrPi2002
+1
Level 77
Sep 9, 2020
Same for me, except I had 18 seconds left.
Philguypi
+2
Level 48
Feb 22, 2021
Might want to clarify that land borders (like china-myanmar) are included. Great quiz! nominated!
Pontiac
+10
Level 61
Oct 9, 2025
Or you could use your common sense and assume that countries with land borders are included
CosmicCalamity
+1
Level 74
Oct 12, 2025
It's in the title. What do you think "bordering each other" means?
jafe
+2
Level 87
Dec 13, 2022
Interesting idea! I think each pair's total length of coastline would be a more intuitive thing to list here. Average rank is such an abstract concept.
Dollyfroggy
+3
Level 63
Aug 3, 2023
Not really, since they're ranked by average rank. If average coastline was used, then larger countries would dominate (anything with Russia). This way, both countries have to be fairly coastal.
jafe
+2
Level 87
Oct 12, 2023
Fair point.
CosmicCalamity
+1
Level 74
Oct 12, 2025
*pairs
Quizmaster
+4
Level ∞
Oct 9, 2025
Sorry about the reset guys. UK/Spain should not have been included.
baptistegorce
+7
Level 57
Oct 9, 2025
Can't wait for people asking why France/Brazil has been kept.
Quizmaster
+4
Level ∞
Oct 9, 2025
Every time, lol.
Pontiac
+1
Level 61
Oct 9, 2025
I mean France's longest border is with Brazil lol
Xtrordinary
+4
Level 75
Oct 10, 2025
(If anyone is going to ask it's because French Guiana is more equivalent to Hawaii unlike Gibraltar which is more analogous to Guam.)
JonOfKent
+3
Level 61
Oct 12, 2025
Is that supposed to make it clearer?!
Thomas1VL
+2
Level 67
Oct 12, 2025
It was a good example if you know the difference between Hawaii and Guam. It's just that French Guiana is considered an integral part of France mostly with the same laws and status as any region in mainland France, whereas Gibraltar is a British Overseas Territory, with a whole separate status from the UK.
CosmicCalamity
+1
Level 74
Oct 12, 2025
Except that it says external territories aren't included...
Franponese
+4
Level 67
Oct 13, 2025
French Guiana is not an "external territory", it's an overseas department, it is fully integrated to the unitary French Republic, just like Hawaii is fully integrate to the US.
FreeStater
+1
Level 81
Oct 9, 2025
"4 / 5 points. Your best score is 23 / 23."

Never seen that before...

Tramp
+1
Level 79
Oct 9, 2025
I think there's a bug. On my stats page, it says that my best score on this quiz is 104%.
stuthemoo
+1
Level 51
Oct 12, 2025
Timer is too short to make this quiz emjoyable on a phone.
CosmicCalamity
+1
Level 74
Oct 12, 2025
No it isn't. 😂
Geoguy
+1
Level 71
Oct 12, 2025
Frankly unbelievable how often the Brazil-France border pops up on Jetpunk
Cocow
+2
Level 47
Oct 12, 2025
Why France/Brazil has been kept ?
AbsoluteCinema
+1
Level 44
Oct 12, 2025
Forgot France, ah man.
Thunderbear
+1
Level 76
Oct 17, 2025
Sweden and Finland also share a border....
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