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16. Istanbul - There are 27 billionaires in Istanbul, Turkey as of 2018, most of whom make their money in food manufacturing, finance, construction, media, and retail.

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Murat Ülker - Murat Ülker, owner of Godiva Chocolatier, is the richest person in Turkey, followed by Hüsnü Özyeğin, who founded Finansbank.

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15. São Paulo - There are 28 billionaires living in São Paulo, Brazil, where there are more helicopters and bulletproof vehicles than most places in the world.

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Major gaps - While the average income of a São Paulo billionaire is US$4.6 billion, around two million people in the city live in slums.

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14. New Delhi - New Delhi, India is home to 29 billionaires who make their money in petrochemicals, software, steel, construction, and pharmaceuticals.

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Mukesh Ambani - Mukesh Ambani is the wealthiest Indian person, worth US$43.7 billion, followed by Azim Premji who's worth US$21 billion.

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13. (Tied) Seoul - There are 30 billionaires in Seoul, South Korea who are making their money in technology, pharmaceuticals, and cosmetics.

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Samsung - Lee Kun-Hee, chairman of Samsung, has been South Korea's richest person for years, and Jae Y. Lee, the chairman's son, is number three. Bio-pharma business-founder Seo Jung-Jin saw his net worth increase by 500% over the past year to attain second place.

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13. (Tied) Taipei - Taipei, Taiwan is also home to 30 billionaires, though the semi-autonomous island was one of the few places where the richest people saw their wealth shrink.

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Terry Gou - Taiwan's wealthiest person is Terry Gou, founder of the Apple parts supplier Hon Hai Precision Industry, but he's seen his wealth decline by 23%.

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12. (Tied) Singapore - Island nation Singapore has 31 billionaires living on its soil, making their money in real estate, social media, and banking.

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Robert and Philip Ng - Robert and Philip Ng, two brothers in real estate, are worth US$11.9 billion and are Singapore's richest people. But they're closely followed by Eduardo Saveri, worth US$11.8 billion, who co-founded Facebook with Mark Zuckerberg at Harvard.

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12. (Tied) San Francisco - San Francisco, US is also home to 31 billionaires and has seen more and more of them in recent years, mostly profiting off of success in the technology market.

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Elon Musk - The likes of Mark Zuckerberg, Tim Cook, and Elon Musk all live in the San Francisco area.

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12. (Tied) Tokyo - In a three-way tie with Singapore and San Francisco, there are also 31 billionaires living in Tokyo, Japan.

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Masayoshi Son - Masayoshi Son is Japan's wealthiest person, worth US$21.9 billion. He founded the mobile SoftBank. He's closely followed by Tadashi Yanai, founder of clothing giant Fast Retailing.

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11. Paris - The French capital has 36 billionaires living in it.

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Bernard Arnault - Louis Vuitton founder Bernard Arnault is France's richest person, worth US$87.4 billion. The second richest in the country is the family of L'Oreal founder Liliane Bettencourt, worth US$36.1 billion.

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10. Guangzhou - The Chinese city of Guangzhou has 37 billionaires living there, and is one of the fastest-growing cities in the world.

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Nearly doubled - The population of billionaires in the Chinese city near Hong Kong nearly doubled between 2017 and 2018.

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9. Hangzhou - Hangzhou, China is home to 38 billionaires and is the birthplace of AliBaba founder Jack Ma. 

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AliBaba - AliBaba, Amazon's biggest competitor, is headquartered in Hangzhou. 

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8. Bangkok - There are 43 billionaires living in Bangkok, Thailand.

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Chearavanont brothers - The Chearavanont brothers are Thailand's wealthiest, worth US$30 billion, while the Chirathivat family is in second place, worth US$21.2 billion.

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7. Mumbai - India's largest city Mumbai has 55 billionaires, the richest among them is Mukesh Ambani. 

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Mukesh Ambani - Mukesh Ambani is worth US$18 billion, and is the chairman of the petrochemical and energy company, Reliance Industries.

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6. Moscow - The Russian capital is home to 62 billionaires, the richest among them is Vladimir Lisin, who runs a steel and transportation company.

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Vladimir Lisin - Vladimir Lisin is worth US$19.1 billion and is closely followed by Alexey Mordashov, who is worth US$18.7 billion.

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5. (Tied) London - There are 70 billionaires living in London, UK, with the richest being Srichand Parmanand Hinduja. 

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Srichand Parmanand Hinduja - Srichand Parmanand Hinduja is worth US$15.4 billion, slightly more than brothers David and Simon Reuben, who are worth US$15.3 billion.

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5. (Tied) Shanghai - China's biggest city has 70 billionaires living in it, tying with the likes of London.

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Surge - China as a country has seen a massive surge in its billionaires, particularly ones under 40 years of age.

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4. Shenzhen - There are 78 billionaires living in Shenzhen, the Chinese city on Hong Kong's northern border. 

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Giant metropolis - Shenzhen, Hong Kong, and Guangzhou are all very close geographically, and are increasingly forming a mega-metropolis of a combined 40 million people. But Hong Kong is still politically separate from the other two cities.

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3. Hong Kong - There are 80 billionaires living in Hong Kong, the richest being Li Ka-shing. 

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Li Ka-shing - Li Ka-shing is worth US$36 billion and has investments in ports and utilities. Lee Shau Kee is worth US$32 billion, mostly from property development.

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2. New York - America's biggest city is home to 92 billionaires, like the Big Apple's former mayor Michael Bloomberg. New York had more billionaires than any other city in the world until this year.

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Walmart - Media moguls Rupert Murdoch and Michael Bloomberg, hedge fund manager Steven Cohen, and Walmart heiress Alice Walton (along with Russian and Chinese expats) help make up New York's billionaire population.

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1. Beijing - For the first time in history, Beijing has surpassed New York for the title of most billionaires, with a whopping 131 living in the Chinese capital. 

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Robin Li - Tech magnates like Robin Li and Liu Qiangdong have been the face of recent billionaires, while real estate giants like Lu Zhiqiang make up the old guard.

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