According to data from Spear's Wealth Management and WealthInsight, the city has 389,100 people with net worth greater than $1 million. That's 4.63% of the population. For San Francisco, it's one out of every 37 people. The No.1 city, Monaco, has nearly 3 in 10. Below is the full list of cities with millionaire density. TOP 20 GLOBAL CITIES BY MILLIONAIRE DENSITY - FULL BREAKDOWN: 1. Monaco (29.21%) 2. Zurich (27.34%) 3. Geneva (17.92%) 4. New York (4.63%) 5. Frankfurt (3.88%) 6. London (3.39%) 7. Oslo (2.90%) 8. Singapore (2.80%) 9. Amsterdam (2.63%) 10. Florence (2.59%) 11. Hong Kong (2.58%) 12. Rome (2.54%) 13. Dublin (2.40%) 14. Doha (2.31%) 15. Toronto (2.29%) 16. Venice (2.25%) 17. Brussels (2.11%) 18. Houston (2.09%) 19. San Francisco (2.07%) 20. Paris (2.04%)Source: businessinsider.com