The representation of urban structures, by means of metaphors as well as by analogy to city elements and functions, has been the main form of elaborating digital city projects. Digital cities are characterized by the gathering of people and institutions connected through computer network, having a real city as reference. As of 1990 a significant number of cases started to be observed, especially in Europe, the USA and Japan, having various purposes. The paper aims to identify how some digital city projects have contributed to the elaboration of new alternatives of collective life organization and of representing collectivity in the cyberspace, through the elements which structure the public space. In order to achieve this goal, it carries out the conceptual identification of the structures which characterize the Public Space and the Digital City as well as the analysis of twelve digital city projects. The results are presented in a summary table which gathers a set of five purposes associated to fifteen characteristics defining the Virtual Public Space and which indicates, in a comparative way, the cases which best realize the Virtual Public Space. This study contributes to the knowledge and understanding of the socialization processes and factors in communication networks, which are present on an everyday basis in the city dynamics. It also contributes to reveal the importance of developing a project to the digital city allowing for the building of a good communication network and of new possibilities of local development to the cities of today.