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Islands Divided by Multiple Countries

Name the countries of the world that share an island with a different country.
Source: Wikipedia
Non-Jetpunk recognized countries filled in by default
Not including river islands
External territories of countries marked in gold
Quiz by capsmack123
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Last updated: May 16, 2024
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First submittedJuly 3, 2014
Times taken3,226
Average score84.0%
Rating4.90
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Island
%
Countries
New Guinea
59
Papua New Guinea
41
Indonesia
Borneo
73
Indonesia
26
Malaysia
1
Brunei
Ireland
83
Ireland
17
United Kingdom
Hispaniola
64
Dominican Republic
36
Haiti
Isla Grande de
Tierra del Fuego
61
Chile
39
Argentina
Timor
51
Indonesia
49
East Timor
Cyprus
58
Cyprus
35
Northern Cyprus
4
UN Buffer Zone
3
United Kingdom
Sebatik Island
55
Indonesia
45
Malaysia
Usedom
84
Germany
16
Poland
Island
%
Countries
Saint Martin
59
France
41
Netherlands
Hans Island
60
Canada
40
Denmark
Kataja
85
Finland
15
Sweden
Passport Island
50
Bahrain
50
Saudi Arabia
K Island
60
Ukraine
40
Romania
Vanhasaari
?
Finland
?
Russia
Jähi
?
Finland
?
Russia
Unnamed island
southeast of Peräluot
?
Finland
?
Russia
Märket
55
Finland
45
Sweden
16 Comments
+1
Level 60
Nov 21, 2020
Nice Quiz 5/5
+3
Level 72
May 16, 2024
Small typo in the description, it currently says "that share and island.."

Also, you should probably add a caveat stating that lake islands & river islands are not considered. Otherwise, this list gets a bit messier.

+3
Level 78
May 16, 2024
Spain and France share Pheasant Island too....

Wikipedia article

Although this is a river island, perhaps as cta127 says, add a caveat to not include river and lake islands.

+1
Level 84
May 16, 2024
Hans Island is 40% Canada, 60% Denmark.
+3
Level 95
May 16, 2024
It should be "Peräluoto" not "Peräluot".

Source: I'm Finnish.

+1
Level 76
May 16, 2024
Loved the quiz!
+1
Level 76
May 16, 2024
St Martin in France is not an "external territory" - it's an integral part of France proper.
+1
Level ∞
May 16, 2024
It's complicated.

https://en.wikipedia.org/wiki/Overseas_collectivity

+1
Level 83
May 17, 2024
Generally only overseas departments are considered a regular part of France
+1
Level 76
May 16, 2024
Jähi, according to googlemaps, is wholly within Finland. (As I'm in Helsinki at the moment, maybe I should go and take a look!)
+1
Level 88
May 16, 2024
K Island is a river island. Never heard of it before mind…
+1
Level ∞
May 16, 2024
It's complicated.

https://en.wikipedia.org/wiki/K_Island

+1
Level 77
May 16, 2024
Fun. Love the included percentages.
+1
Level 68
May 16, 2024
Karaja is 85% Sweden and 15% Finland.
+2
Level 72
May 16, 2024
So does JetPunk recognize the border between Bahrain and Saudi Arabia or not? Because I always thought you didn't, but if you're recognizing the island as shared, then shouldn't there be a border? There's a guy who used to drive across that causeway once a week who would've told us all about how the McDonald's on the KSA side closes at prayer times but the McDonald's on the Bahrain side doesn't. Takes you back, man....
+2
Level 73
May 19, 2024
I also had to think about him when I saw Passport Island. :) Credit where credit is due, I wouldn't have known the answer if it wasn't for him.