According to research firm Wealth-X, which releases an annual Billionaire Census, there are 2,473 billionaires in the world.
Some countries are populated with hundreds of them. Take the United States, which is home to 585 — that's just under 25 percent of the world's billionaires.
After all, "billionaires like to be in areas where other billionaires are likely to be located as well," Wealth-X tells CNBC.
Here are the 11 countries with the largest populations of billionaires — and the total wealth held by the billionaire residents — courtesy of Wealth-X.
11. France
Number of billionaires: 52
Total wealth held by billionaires: $206 billion
9. Brazil
Number of billionaires: 59
Total wealth held by billionaires: $186 billion
9. Saudi Arabia
Number of billionaires: 59
Total wealth held by billionaires: $181 billion
8. Hong Kong
Number of billionaires: 79
Total wealth held by billionaires: $291 billion
7. India
Number of billionaires: 90
Total wealth held by billionaires: $206 billion
6. Switzerland
Number of billionaires: 95
Total wealth held by billionaires: $235 billion
5. United Kingdom
Number of billionaires: 106
Total wealth held by billionaires: $295 billion
4. Russia
Number of billionaires: 118
Total wealth held by billionaires: $348 billion
3. Germany
Number of billionaires: 130
Total wealth held by billionaires: $423 billion
2. China
Number of billionaires: 260
Total wealth held by billionaires: $675 billion
1. United States
Number of billionaires: 585
Total wealth held by billionaires: $2.466 trillion