Abstract : This paper analyses the relations between the access of urban households to Internet, their endowment in numeric equipments and the competences of young adult between 18 and 24 years old use in Saint-Louis and Ziguinchor. The study questions the numeric and social inequelities from a specific context of households and investigate districts in mediumt-sized cities, while gathering the approach of real access to understand the intra and inter disparities districs. The results show that the weak integration of numeric infrastructures in the urban area infringes the inclusion and access of internet particularly in peripheral and spontaneous sphere. In addition, the inequalities in access to the grounded social services reinforce the numeric bill. At last, the weak numeric competence of users, specifically that of the young urbanist brakes their participation to the urban governance, calling to a second numeric socialization in the intermediary cities of Senegal. Keywords : households, access to internet ; urban dynamic, social numeric innequality, young, intermediary cities, Saint-Louis, Ziguinchor.