Largest River Drainage Basins

Name the 50 river drainage basins with the largest area.
Includes tributary rivers that are part of even larger river drainage basins.
Source: https://en.wikipedia.org/wiki/List_of_drainage_basins_by_area
Note: one river marked n/a ends in an endorheic basin, a closed drainage basin with no outflow.
Quiz by Eutychus
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Last updated: February 19, 2018
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First submittedSeptember 11, 2017
Times taken574
Average score52.0%
Rating4.44
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Rank
Continent
Drains to
Answer
1
South America
Atlantic Ocean
Amazon
2
Africa
Atlantic Ocean
Congo
3
Africa
Mediterranean Sea
Nile
4
North America
Gulf of Mexico
Mississippi
5
South America
Atlantic Ocean
Rio de la Plata
6
Asia
Arctic Ocean
Ob
7
South America
#5
Parana
8
Asia
Arctic Ocean
Yenisei
9
Asia
Arctic Ocean
Lena
10
Africa
Atlantic Ocean
Niger
11
Asia
Pacific Ocean
Amur
12
North America
Arctic Ocean
Mackenzie
13
Asia
Pacific Ocean
Yangtze
14
Asia
#6
Irtysh
15
Asia
Bay of Bengal
Meghna-Padma-Ganges-Brahmaputra
16
South America
#1
Madeira
17
Europe
Caspian Sea
Volga
18
Africa
Indian Ocean
Zambezi
19
North America
#4
Missouri
20
South America
#7
Paraguay
21
Asia
Arabian Sea
Indus
22
North America
Hudson Bay
Nelson
23
Oceania
Southern Ocean
Murray
24
North America
Atlantic Ocean
Saint Lawrence
25
Asia
#8
Angara
Rank
Continent
Drains to
Answer
26
Asia
#15
Ganges
27
South America
Atlantic Ocean
Orinoco
28
Asia
Pacific Ocean
Yellow
29
Africa
Atlantic Ocean
Orange
30
Africa
#2
Kasai
31
North America
Bering Sea
Yukon
32
Asia
Pacific Ocean
Mekong
33
Africa
Indian
Jubba-Shebelle
34
Europe
Black Sea
Danube
35
Asia
Aral Sea
Syr Darya
36
Asia
Persian Gulf
Tigris-Euphrates
37
South America
Atlantic Ocean
Tocantins
38
Africa
n/a
Okavango
39
South America
#1
Rio Negro
40
North America
Gulf of California
Colorado
41
Asia
Arctic Ocean
Kolyma
42
North America
Pacific Ocean
Columbia
43
Asia
#15
Brahmaputra
44
South America
Atlantic Ocean
Sao Francisco
45
Africa
#2
Ubangi
46
North America
Gulf of Mexico
Rio Grande
47
Africa
Lake Chad
Chari
48
Asia
Aral Sea
Amu Darya
49
Europe
Black Sea
Dnieper
50
South America
#1
Xingu
9 Comments
+1
Level 95
Sep 11, 2017
Nice quiz! Would be good to allow Yenisei which I think is the more usual spelling.
+1
Level 90
Sep 11, 2017
Fixed. Thanks!
+1
Level 66
Nov 13, 2022
Can you please allow Yenisei, Jenisej and other type-ins please?
+1
Level 74
Dec 11, 2017
Great quiz! Just did your other drainage basin quiz too.
+1
Level 61
Feb 16, 2018
GReat quiz ! Though I think there might be a mistake with the Xingu (#50) location.
+1
Level 90
Feb 19, 2018
Thanks for that catch! Fixed.
+2
Level 82
Oct 13, 2022
Nice quiz. Nominated.
+3
Level 69
Oct 13, 2022
Can you accept Negro for Rio Negro? Otherwise, great quiz.
+1
Level 66
Oct 13, 2022
A smaller river repeats its name in a bigger river system.