4. Oslo (Norway)
As the OECD report suggests, Oslo’s GDP per capita is the highest in the country. The last measured GDP per capita was $82,040, making it the city with 2nd highest GDP per capita in the world in 2013.

Pixabay/Public Domain
Let’s see the grand finale of the top 20 richest cities in the world in 2018 by GDP per capita list, shall we?