Miami is one of the top US cities for billionaires, with 12 in residence.Sylvain Sonnet/Getty Images The US is home to 770 billionaires, according to London-based consulting firm Henley & Partners. The firm tracks where global millionaires and billionaires, or high-net-worth individuals, live. Here, the 9 US cities with the most billionaires, from the San Francisco Bay Area to Austin, Texas. About 770 billionaires live in the United States, according to a new report on the world's wealthiest cities from London-based consulting firm Henley & Partners.There are just a handful of cities they love to call home — or at least park their private jets when they're in town.