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Biggest World Cities on Major Rivers

Can you name the most populous urban areas in the world that are situated on the banks of rivers at least 1,000 km long?
Includes cities on distributaries of major rivers (i.e. rivers that branch off the main river, usually near a delta).
River length is measured from the river source or the source of the longest tributary.
The loosely-defined Ruhr urban area has been filled in.
Sources: Wikipedia, citypopulation.de (September 2017)
Quiz by georgekotz
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Last updated: September 2, 2017
First submittedSeptember 2, 2017
Times taken64
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Population
City
48.6 mil
Guangzhou
31.1 mil
Shanghai
27.2 mil
Delhi
25.1 mil
Karachi
21.9 mil
São Paulo
17.9 mil
Dhaka
17.4 mil
Bangkok
17.1 mil
Cairo
16.2 mil
Kolkata
16.0 mil
Buenos Aires
Population
City
11.8 mil
Tianjin
10.9 mil
Kinshasa
8.10 mil
Wuhan
7.20 mil
Chongqing
7.05 mil
Nanjing
7.00 mil
Baghdad
6.75 mil
Dallas
6.35 mil
Houston
5.70 mil
Khartoum
5.70 mil
The Ruhr
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