This is from a different source, but the list is the same one from March 2017:
Beijing (94)
New York (86)
Hong Kong (71)
Shenzhen (62)
Moscow (59)
London (55)
Shanghai (53)
Mumbai (42)
Paris (36)
Hangzhou (36)
There are now 2,257 billionaires in the world, up 69 from last year and 804 over the past 5 years. China has the most billionaires of any country, with 609, while the USA comes in second place overall, with 552. Together, the two countries account for 1,161 billionaires, or more than half the world’s billionaire population.