9. San Francisco, California (USA)
Projected 2016 GDP per capita, PPP: $71,668
With Silicon Valley in its full bloom, San Francisco easily earns its spot on this list of 20 richest cities in the world by 2016 GDP per capita. Interestingly, though, it’s recording a negative GDP growth of -0.5%, This means that $72,390 in 2014 now translate to purchasing power parity GDP per capita of $71,668.