The New York City remains at the top rank with 384,500 millionaires, 818 centi-millionaires (individuals with assets over $100 million), and 66 billionaires.
The Bay Area (covering San Francisco and Silicon Valley) ranked 2nd with about 305,700 millionaires.
Tokyo stands as Asia's wealthiest city, boasting 298,300 millionaires stands 3rd globally.
It is followed by Singapore, Los Angeles, London, Paris, Hong Kong and Sydney.
India's Mumbai ranked at 27th with 58,800 millionaires, 236 centi-millionaires, and 29 billionaires.
Delhi ranked at 36th with 30,700 millionaires and 16 billionaires.