Boulogne-Billancourt, France

Capital City

With a population of 119,019, Boulogne-Billancourt is one of the wealthiest areas in the Parisian region. Formerly an industrial hub, the city has successfully transitioned to become home to major communications companies. However, the bureaucracy can be a persistent headache for residents, as the city is part of a larger agglomeration with its own administrative layers. On the plus side, the ecologically-minded Trapèze district offers sustainable living with geothermal power and reduced car usage. Overall, Boulogne-Billancourt caters best to affluent professionals seeking a corporate base close to Paris.