Fifteen countries dominate in billionaire population and wealth, according to Wealth-X's 2019 Billionaire Census report . The report analyzed data from Wealth-X's global database of more than one million records of the world's richest people.

Three-fourths of the world's billionaire population lives in the 15 countries listed below. Collectively, the 1,942 billionaires in these countries are worth $6.8 trillion that accounts for 79% of total global billionaire wealth in 2018.

When it comes to billionaire population, the United States dominates with 27% of the world's billionaires. Its total billionaire count rose from 2017 to 2018 by 4% to 705 billionaires. Meanwhile, total billionaire wealth worldwide decreased by 5% to slightly more than $3 trillion.

All the top Asia-Pacific countries China, Hong Kong, India, and Singapore saw a decrease in billionaires and billionaire wealth due to a decline in equity markets, according to the report. Meanwhile, major European countries saw both decreases and increases in billionaires, depending on economic factors.

Note that Hong Kong and Singapore also made Wealth-X's list of the top 15 cities with the most billionaires Hong Kong is a semi-autonomous, special administrative region of China, and Singapore is an island city-state off southern Malaysia.

Take a look at which countries worldwide have the most billionaires, ranked in ascending order.

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