There are a number of different lists compiled by various publications around the world attempt to determine the number of billionaires by world's major cities.
In 2024, Forbes listed New York City with the most billionaires at 110 people, followed by Hong Kong and Moscow, tied at second place, with 74 billionaires, and Mumbai in fourth place with 69 billionaires.
[1] The latest World’s Wealthiest Cities Report by Henley & Partners[2] shows San Francisco (including the San Francisco Bay Area) overtaking New York as the city with the most billionaires, as well as overtaking Tokyo to become second to New York in millionaires.
Notably, Monaco, with a population under 50,000, is home to 20 billionaires.
[2] In 2024, Hurun Research Institute listed London with the most billionaires at 143 people, followed by New York City with 119 billionaires, and Mumbai in third place with 92 billionaires.