This paper discusses relevant interrelations between Italian economic development and immigration flows. The fundamental idea is that the Italian economic development is based on competitive advantage factors which prevalently have a social and cultural nature, as expressed in the districtual experiences. A question that can arise is concerning the effect of relevant immigratory flows on the social stability of areas such as districtual ones. So, we can have a phenomenon of social influence of immigrants culture. Contemporary we can have a phenomenon of social influence of districtual forms on immigrants culture