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Top 10 African Countries by Coastline

Name the African nations that have the longest coastlines.
Includes marginal seas
Keep in mind the effect of irregular coastlines
Last updated: April 18, 2019
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Kilometers
Country
5,440
Madagascar
3,840
Mozambique
3,790
Egypt
3,070
South Africa
2,710
Morocco
Kilometers
Country
2,440
Somalia
2,190
Nigeria
1,920
Guinea-Bissau
1,910
Tanzania
1,900
Gabon
+2
level ∞
Apr 18, 2019
Redid the quiz to use our new and better source.
+3
level ∞
Apr 18, 2019
Guinea-Bissau makes the lists due to its very irregular coastline. Meanwhile Algeria and Libya have very smooth coastlines, which makes them relatively smaller.
+3
level 68
Apr 18, 2019
Guinea-Bissau would've been one of my last answers, behind a couple landlocked countries. I'll be darned.
+2
level ∞
Apr 18, 2019
#11: Angola #12: Libya
+1
level 63
Apr 18, 2019
Guinea Bissau not mentioned on other lists of longest African coastlines despite its irregular coastline - only 350 km apparently.
+1
level 35
Apr 19, 2019
Yeah; I call BS on GB being longer than Angola or Libya
+1
level 73
Apr 19, 2019
QM called BS on other lists :)
+1
level ∞
Apr 19, 2019
Look at the map at Guinea-Bissau. It is practically a real-life example of a Koch snowflake.
+1
level 53
Apr 19, 2019
Guinea-Bissau and Gabon beating out larger countries was certainly a shock to me. But those irregular coastlines tricked us!
+1
level 75
Apr 19, 2019
I got Guinea-Bissau but only because I was getting desperate and guessing everything.
+1
level 40
Apr 19, 2019
Great quiz. Thanx. However, the facts need to be checked once more. There are many different ways of measuring coast lines. But including Guinea-Bissau seems bizarre.
+2
level ∞
Apr 19, 2019
A lot of Guinea-Bissau experts in here all of a sudden. But there's nothing to check. The computer measured the coastlines not me.
+1
level ∞
Apr 22, 2019
By the way, people would have been happier if I just manually fudged the numbers to make Guinea-Bissau smaller. If I did that, no one would have noticed and no one would have complained.
+1
level 74
Apr 23, 2019
Coast lines are notoriously hard to measure. Like my mother used to say, "Figures don't lie, but liars can figure." (Not calling you a liar, just saying coastlines are subjective.)
+1
level 63
Apr 26, 2019
And the coastline of a beach magically doubles when you replace the sand by gravel - not to talk about rocks, right? ;-)
+1
level 72
May 1, 2019
The 'fractal' nature of coastlines make measuring them accurately impossible. The best you can do (that I can think of) is take a set distance to use as a minimum tolerance and ignore discrepancies smaller than that distance

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