I suppose it depends on how you define a "city area", but there are a great many with more than the NYC area's mere 20 million people. For example, Shanghai, Ka

I suppose it depends on how you define a "city area", but there are a great many with more than the NYC area's mere 20 million people. For example, Shanghai, Karachi, and Beijing each exceed that within city limits alone! (See also: https://en.wikipedia.org/wiki/List_of_metropolitan_areas_by_population https://en.wikipedia.org/wiki/List_of_metropolitan_areas_by_..., though some of the data on that page is out of date)