The definition and measurement of socio-economic phenomena, as well-being, is developing a wide scientific debate at international level both from theoretical and methodological point of view since they are considered in a multidimensional approach, abandoning the assumption that only the economic component is relevant. On this issue, economists, sociologists and statisticians are working together to define conceptual models and mathematical-statistical techniques that can measure them. Recently, the policy has shown, for example, great interest in linking the well-being indicators to the economic policy of national and local areas. In this regard, it seems important to calculate indicators up to a very small territorial level. The paper wants to present composite indicators in order to have a unidimensional measure that can help the policy makers to understand the complex reality.