The purpose of this work is to understand the structure of electricity consumption at the level of municipalities in an island area. Due to the depletion of fossil energy resources, some territories are more affected than others, especially because of their location and dependence. Such is the case of islands, such as Reunion Island. For these territories, it is important to understand the localized needs to prepare for energy supply. This work raises the issue of energy consumption in Reunion: what are its determi-nants? Two methods are used to illustrate the problem, and the matter of the disparity in the territory is highlighted with at least three types of energy consumption profiles at the municipal level that reflect the issues of localized energy management.