The study of spatial clustering's phenomena of people in zones often focuses on the most strongly polarized spaces, it can be about "ghettos" of "rich" or "poor people". Nevertheless, these areas represent a small part of the French urban space. Without denying the existence of these zones, this work will study the phenomena of spatial clustering from an exhaustive point of view. This required the development of a methodology allowing to take into account the complexity of the socioeconomic and sociodemographic specialization of territories. The impact of the geographical scale selected in analyses, on the results both in term of intensity and evolution is turned to be a central topic of the problematic. By basing itself on this comparative analysis of the geographical scales of clustering, this work gives an overview of the clustering profiles in 18 French urban areas. It appeared that there is a similarity of these phenomena between big cities. Human distributions follow a sectorial model on a socioeconomic point of view when they follow a concentric model by sociodemographic variables. The combination of these two paradigms of grouping so allowed a global analysis of the phenomena of socio-spatial clustering.
