10. Dallas, Texas, is the sixth wealthiest US city.
9. Wealth in Washington, DC, has reached new heights.
Number of ultra-high-net-worth individuals: 2,785 (up 1.8%)
In recent years, wealth in Washington, DC, has spawned a "new class of superrich," reported Robert Frank for The New York Times.
"The combination of the richest White House in history and a boom in government-related businesses and technology companies is transforming Washington's affluence into opulence," he wrote.
8. San Francisco, California, could be home to thousands of new millionaires by the end of 2019.
7. Chicago, Illinois, saw a nearly 3% increase in its ultra-wealthy population.
next slide will load in 15 secondsSkip AdSkip Ad6. Paris, France, has fortunes rooted in food, fashion, and luxury good industries.
Number of ultra-high-net-worth individuals: 3,955 (up 0.1%)
Many of France's billionaires, like LVMH founder and CEO Bernard Arnault, are wealthy from success in the global luxury and fashion business, Hugh Carnegy reported for Financial Times.
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.
3. Tokyo, Japan, is home to 40% of the country's wealthy class.
Number of ultra-high-net-worth individuals: 7,090 (up 4.5%)
Tokyo serves as Japan's main hub for the telecommunications, electronics, and publishing industries, according to Wealth-X.
2. Hong Kong fell from its No. 1 ranking in 2017 thanks to a downward trend in Asian equity markets and a softening Chinese economy.
next slide will load in 15 secondsSkip AdSkip Ad1. 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.