5. London, England, is the leading ultra-wealthy city in Europe.
Number of ultra-high-net-worth individuals: 4,035 (up 5.4%)
London witnessed the biggest growth in its ultra-wealthy population out of all the cities thanks to "dollar-denominated wealth gains" in the city's internationalized financial sector, according to Wealth-X.
4. Los Angeles, California, has the second-most number of ultra-wealthy people in the US.
Number of ultra-high-net-worth individuals: 5,295 (up 0.9%)
1. New York City, New York, accounts for 11% of the US's ultra-rich cohort.
Number of ultra-high-net-worth individuals: 8,980 (up 1.3%)
As a global financial center and the US' largest regional economy, New York City attracts those "seeking a blend of high-end finance, vibrant culture, luxury commerce, and prime real estate," Wealth-X stated.
The metro area consists of more billionaires than any other country, except for China and Germany.