Biggest cities by population starting with O

How many cities can you name above 1 million people starting with the letter O?
Sourced from World Population Review
Only cities with a population above 1 million inhabitants
Omdurman is not included
There are 5 cities with more than 1 million inhabitants
Quiz by
Camnob19
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Last updated: May 16, 2025
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First submittedMay 7, 2025
Times taken37
Average score60.0%
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Population
Country
Answer
~2,592,400
Japan
Osaka
~1,940,700
China
Ordos
~1,129,300
Russia
Omsk
~1,086,500
Burkina Faso
Ouagadougou
~1,001,600
Ukraine
Odessa
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