But London, New York and Tokyo are very large cities. The picture changes when we control for population and track the locations of the global super-rich on a per capita basis.  The map below charts the trend.

Now, smaller cities dominate. Geneva tops the list, with 144 super-rich individuals per 100,000 residents, followed by Swiss counterpart Zurich, with 71. Home to fabled Swiss banks, these cities have long been the favored locations of global plutocrats. As the table below shows, Singapore and Hong Kong retain their high placement, ranking third and fifth, respectively. London drops to eighth, New York to 19th, Paris to 24th and Tokyo to 32nd.

It sure looks like Europe is ground zero for the super rich. 

Old money.

Makes sense. What's the large circle below China?

Singapore?

I think you're right:

London is the world’s top location for the super-rich, with 4,364 people with $30 million or more in assets. Tokyo is second with 3,575, followed by Singapore (3,227), New York (3,008) and Hong Kong (2,690). The table below shows the top 20 cities with the most ultra-high-net-worth individuals.