Biggest Second-Biggest Cities

Name the 25 largest world cities that are also the second largest city in their country.

By urban agglomeration population according to citypopulation.de

The source considers the Ruhr Valley urban agglomeration to be Germany's "largest city."

#25 on the list is a tie (within the same country, not between two countries). Either answer will be accepted.

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Last updated: February 15, 2019

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First submitted	July 11, 2018
Times taken	51
Average score	88.0%
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Population	Continent	City
35,900,000	Asia	Shanghai
24,700,000	Asia	Mumbai
17,800,000	North America	Los Angeles
17,700,000	Asia	Osaka
13,100,000	South America	Rio de Janeiro
12,600,000	Asia	Lahore
6,850,000	Asia	Bandung
5,700,000	Africa	Alexandria
5,600,000	Europe	Saint Petersburg
5,250,000	North America	Guadalajara
5,000,000	Europe	Cologne/Düsseldorf
4,975,000	Asia	Ankara
4,850,000	Oceania	Melbourne
4,825,000	Asia	Chittagong
4,775,000	Asia	Jeddah
4,725,000	Europe	Barcelona
4,550,000	Africa	Kano
4,250,000	North America	Montreal
4,225,000	Europe	Naples
4,175,000	Africa	Cape Town
4,125,000	Asia	Busan
3,950,000	South America	Medellín
3,900,000	Asia	Hanoi
3,250,000	Africa	Douala
3,150,000	Asia	Isfahan/Mashhad